78533681385656 has 24 divisors (see below), whose sum is σ = 171291575472120. Its totient is φ = 33657292022256.

The previous prime is 78533681385563. The next prime is 78533681385661. The reversal of 78533681385656 is 65658318633587.

It is a super-2 number, since 2×78533681385656² (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, 100170511580 + ... + 100170512363.

It is an arithmetic number, because the mean of its divisors is an integer number (7137148978005).

Almost surely, 2^{78533681385656} is an apocalyptic number.

It is an amenable number.

78533681385656 is an abundant number, since it is smaller than the sum of its proper divisors (92757894086464).

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

78533681385656 is a wasteful number, since it uses less digits than its factorization.

78533681385656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200341023963 (or 200341023952 counting only the distinct ones).

The product of its digits is 2612736000, while the sum is 74.

The spelling of 78533681385656 in words is "seventy-eight trillion, five hundred thirty-three billion, six hundred eighty-one million, three hundred eighty-five thousand, six hundred fifty-six".