78012651 has 8 divisors (see below), whose sum is σ = 109491520. Its totient is φ = 49271112.

The previous prime is 78012637. The next prime is 78012653. The reversal of 78012651 is 15621087.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78012651 - 2⁶ = 78012587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78012653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684265 + ... + 684378.

It is an arithmetic number, because the mean of its divisors is an integer number (13686440).

Almost surely, 2^78012651 is an apocalyptic number.

78012651 is a deficient number, since it is larger than the sum of its proper divisors (31478869).

78012651 is a wasteful number, since it uses less digits than its factorization.

78012651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368665.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 78012651 is about 8832.4770591267. The cubic root of 78012651 is about 427.2889666668.

It can be divided in two parts, 780 and 12651, that added together give a palindrome (13431).

The spelling of 78012651 in words is "seventy-eight million, twelve thousand, six hundred fifty-one".