78157482020577 has 24 divisors (see below), whose sum is σ = 117811617528384. Its totient is φ = 49835730858144.

The previous prime is 78157482020557. The next prime is 78157482020591. The reversal of 78157482020577 is 77502028475187.

78157482020577 is a `hidden beast` number, since 7 + 8 + 1 + 57 + 4 + 8 + 2 + 0 + 2 + 0 + 577 = 666.

It is not a de Polignac number, because 78157482020577 - 2²⁰ = 78157480972001 is a prime.

It is a super-2 number, since 2×78157482020577² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78157482020557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11774238 + ... + 17174039.

It is an arithmetic number, because the mean of its divisors is an integer number (4908817397016).

Almost surely, 2^{78157482020577} is an apocalyptic number.

It is an amenable number.

78157482020577 is a deficient number, since it is larger than the sum of its proper divisors (39654135507807).

78157482020577 is a wasteful number, since it uses less digits than its factorization.

78157482020577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28961349 (or 28961346 counting only the distinct ones).

The product of its (nonzero) digits is 61465600, while the sum is 63.

The spelling of 78157482020577 in words is "seventy-eight trillion, one hundred fifty-seven billion, four hundred eighty-two million, twenty thousand, five hundred seventy-seven".