78331707807 has 16 divisors (see below), whose sum is σ = 106674001920. Its totient is φ = 51105475232.

The previous prime is 78331707799. The next prime is 78331707847. The reversal of 78331707807 is 70870713387.

It is a cyclic number.

It is not a de Polignac number, because 78331707807 - 2³ = 78331707799 is a prime.

It is a super-2 number, since 2×78331707807² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78331707807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78331707847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2372569 + ... + 2405357.

It is an arithmetic number, because the mean of its divisors is an integer number (6667125120).

Almost surely, 2^78331707807 is an apocalyptic number.

78331707807 is a deficient number, since it is larger than the sum of its proper divisors (28342294113).

78331707807 is a wasteful number, since it uses less digits than its factorization.

78331707807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49782.

The product of its (nonzero) digits is 1382976, while the sum is 51.

The spelling of 78331707807 in words is "seventy-eight billion, three hundred thirty-one million, seven hundred seven thousand, eight hundred seven".