78612586951 has 4 divisors (see below), whose sum is σ = 80285195232. Its totient is φ = 76939978672.

The previous prime is 78612586937. The next prime is 78612586961. The reversal of 78612586951 is 15968521687.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78612586951 - 2⁹ = 78612586439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78612586961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836304070 + ... + 836304163.

It is an arithmetic number, because the mean of its divisors is an integer number (20071298808).

Almost surely, 2^78612586951 is an apocalyptic number.

78612586951 is a deficient number, since it is larger than the sum of its proper divisors (1672608281).

78612586951 is a wasteful number, since it uses less digits than its factorization.

78612586951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672608280.

The product of its digits is 7257600, while the sum is 58.

The spelling of 78612586951 in words is "seventy-eight billion, six hundred twelve million, five hundred eighty-six thousand, nine hundred fifty-one".