56147541921 has 24 divisors (see below), whose sum is σ = 83380212864. Its totient is φ = 36382309920.

The previous prime is 56147541917. The next prime is 56147541937. The reversal of 56147541921 is 12914574165.

56147541921 is a `hidden beast` number, since 5 + 6 + 14 + 7 + 541 + 92 + 1 = 666.

It is not a de Polignac number, because 56147541921 - 2² = 56147541917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56147540921) 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, 236520 + ... + 410166.

It is an arithmetic number, because the mean of its divisors is an integer number (3474175536).

Almost surely, 2^56147541921 is an apocalyptic number.

It is an amenable number.

56147541921 is a deficient number, since it is larger than the sum of its proper divisors (27232670943).

56147541921 is a wasteful number, since it uses less digits than its factorization.

56147541921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174661 (or 174658 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The spelling of 56147541921 in words is "fifty-six billion, one hundred forty-seven million, five hundred forty-one thousand, nine hundred twenty-one".