7856151601 has 4 divisors (see below), whose sum is σ = 7856580852. Its totient is φ = 7855722352.

The previous prime is 7856151581. The next prime is 7856151617. The reversal of 7856151601 is 1061516587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1061516587 = 991 ⋅1071157.

It can be written as a sum of positive squares in 2 ways, for example, as 1039998001 + 6816153600 = 32249^2 + 82560^2 .

It is a cyclic number.

It is not a de Polignac number, because 7856151601 - 2¹⁵ = 7856118833 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7856101601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185890 + ... + 224203.

It is an arithmetic number, because the mean of its divisors is an integer number (1964145213).

Almost surely, 2^7856151601 is an apocalyptic number.

It is an amenable number.

7856151601 is a deficient number, since it is larger than the sum of its proper divisors (429251).

7856151601 is a wasteful number, since it uses less digits than its factorization.

7856151601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429250.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 7856151601 is about 88634.9344276849. The cubic root of 7856151601 is about 1987.9400584908.

The spelling of 7856151601 in words is "seven billion, eight hundred fifty-six million, one hundred fifty-one thousand, six hundred one".