18130078821537 has 12 divisors (see below), whose sum is σ = 26297464402560. Its totient is φ = 12036147166008.

The previous prime is 18130078821529. The next prime is 18130078821539. The reversal of 18130078821537 is 73512887003181.

18130078821537 is a `hidden beast` number, since 1 + 8 + 1 + 3 + 0 + 0 + 7 + 88 + 21 + 537 = 666.

It is not a de Polignac number, because 18130078821537 - 2³ = 18130078821529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18130078821539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4214335093 + ... + 4214339394.

It is an arithmetic number, because the mean of its divisors is an integer number (2191455366880).

Almost surely, 2^{18130078821537} is an apocalyptic number.

It is an amenable number.

18130078821537 is a deficient number, since it is larger than the sum of its proper divisors (8167385581023).

18130078821537 is a wasteful number, since it uses less digits than its factorization.

18130078821537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8428674732 (or 8428674729 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 54.

The spelling of 18130078821537 in words is "eighteen trillion, one hundred thirty billion, seventy-eight million, eight hundred twenty-one thousand, five hundred thirty-seven".