78610007861 has 16 divisors (see below), whose sum is σ = 98094663168. Its totient is φ = 61199938800.

The previous prime is 78610007849. The next prime is 78610007863. The reversal of 78610007861 is 16870001687.

It is not a de Polignac number, because 78610007861 - 2²⁶ = 78542898997 is a prime.

It is a Smith number, since the sum of its digits (44) 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78610007863) 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 15 ways as a sum of consecutive naturals, for example, 368075 + ... + 541016.

It is an arithmetic number, because the mean of its divisors is an integer number (6130916448).

Almost surely, 2^78610007861 is an apocalyptic number.

It is an amenable number.

78610007861 is a deficient number, since it is larger than the sum of its proper divisors (19484655307).

78610007861 is a wasteful number, since it uses less digits than its factorization.

78610007861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910232.

The product of its (nonzero) digits is 112896, while the sum is 44.

The spelling of 78610007861 in words is "seventy-eight billion, six hundred ten million, seven thousand, eight hundred sixty-one".