78610385251 has 8 divisors (see below), whose sum is σ = 82055310624. Its totient is φ = 75167716800.

The previous prime is 78610385239. The next prime is 78610385257. The reversal of 78610385251 is 15258301687.

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

It is not a de Polignac number, because 78610385251 - 2⁹ = 78610384739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78610385257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492850 + ... + 632551.

It is an arithmetic number, because the mean of its divisors is an integer number (10256913828).

Almost surely, 2^78610385251 is an apocalyptic number.

78610385251 is a deficient number, since it is larger than the sum of its proper divisors (3444925373).

78610385251 is a wasteful number, since it uses less digits than its factorization.

78610385251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128461.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 78610385251 in words is "seventy-eight billion, six hundred ten million, three hundred eighty-five thousand, two hundred fifty-one".