78125011764 has 12 divisors (see below), whose sum is σ = 182291694144. Its totient is φ = 26041670584.

The previous prime is 78125011763. The next prime is 78125011787. The reversal of 78125011764 is 46711052187.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×78125011764² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78125011763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3255208812 + ... + 3255208835.

It is an arithmetic number, because the mean of its divisors is an integer number (15190974512).

Almost surely, 2^78125011764 is an apocalyptic number.

It is an amenable number.

78125011764 is an abundant number, since it is smaller than the sum of its proper divisors (104166682380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78125011764 is a wasteful number, since it uses less digits than its factorization.

78125011764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6510417654 (or 6510417652 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 42.

The spelling of 78125011764 in words is "seventy-eight billion, one hundred twenty-five million, eleven thousand, seven hundred sixty-four".