78504338317536 has 36 divisors (see below), whose sum is σ = 223246712091312. Its totient is φ = 26168112772416.

The previous prime is 78504338317523. The next prime is 78504338317577. The reversal of 78504338317536 is 63571383340587.

It is a happy number.

78504338317536 is a `hidden beast` number, since 7 + 8 + 5 + 0 + 4 + 3 + 3 + 83 + 17 + 536 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×78504338317536² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136292253736 + ... + 136292254311.

It is an arithmetic number, because the mean of its divisors is an integer number (6201297558092).

Almost surely, 2^{78504338317536} is an apocalyptic number.

It is an amenable number.

78504338317536 is an abundant number, since it is smaller than the sum of its proper divisors (144742373773776).

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

78504338317536 is a wasteful number, since it uses less digits than its factorization.

78504338317536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272584508063 (or 272584508052 counting only the distinct ones).

The product of its (nonzero) digits is 152409600, while the sum is 63.

The spelling of 78504338317536 in words is "seventy-eight trillion, five hundred four billion, three hundred thirty-eight million, three hundred seventeen thousand, five hundred thirty-six".