56197138536 has 192 divisors, whose sum is σ = 192160051200. Its totient is φ = 14411779200.

The previous prime is 56197138511. The next prime is 56197138537. The reversal of 56197138536 is 63583179165.

56197138536 is a `hidden beast` number, since 5 + 6 + 1 + 9 + 71 + 38 + 536 = 666.

It is not an unprimeable number, because it can be changed into a prime (56197138537) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 373821 + ... + 502131.

It is an arithmetic number, because the mean of its divisors is an integer number (1000833600).

Almost surely, 2^56197138536 is an apocalyptic number.

56197138536 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56197138536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96080025600).

56197138536 is an abundant number, since it is smaller than the sum of its proper divisors (135962912664).

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

56197138536 is a wasteful number, since it uses less digits than its factorization.

56197138536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128420 (or 128413 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The spelling of 56197138536 in words is "fifty-six billion, one hundred ninety-seven million, one hundred thirty-eight thousand, five hundred thirty-six".