78183636865464 has 128 divisors (see below), whose sum is σ = 220275703872000. Its totient is φ = 22944635112960.

The previous prime is 78183636865429. The next prime is 78183636865469. The reversal of 78183636865464 is 46456863638187.

78183636865464 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×78183636865464² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78183636865469) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13104682 + ... + 18113529.

It is an arithmetic number, because the mean of its divisors is an integer number (1720903936500).

Almost surely, 2^{78183636865464} is an apocalyptic number.

It is an amenable number.

78183636865464 is an abundant number, since it is smaller than the sum of its proper divisors (142092067006536).

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

78183636865464 is a wasteful number, since it uses less digits than its factorization.

78183636865464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31218605 (or 31218601 counting only the distinct ones).

The product of its digits is 3344302080, while the sum is 75.

The spelling of 78183636865464 in words is "seventy-eight trillion, one hundred eighty-three billion, six hundred thirty-six million, eight hundred sixty-five thousand, four hundred sixty-four".