656150801 has 4 divisors (see below), whose sum is σ = 656318004. Its totient is φ = 655983600.

The previous prime is 656150783. The next prime is 656150837. The reversal of 656150801 is 108051656.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29149201 + 627001600 = 5399^2 + 25040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656150801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656150401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77570 + ... + 85611.

It is an arithmetic number, because the mean of its divisors is an integer number (164079501).

Almost surely, 2^656150801 is an apocalyptic number.

It is an amenable number.

656150801 is a deficient number, since it is larger than the sum of its proper divisors (167203).

656150801 is a wasteful number, since it uses less digits than its factorization.

656150801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167202.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 656150801 is about 25615.4406754988. The cubic root of 656150801 is about 868.9628725558.

The spelling of 656150801 in words is "six hundred fifty-six million, one hundred fifty thousand, eight hundred one".