56861249536 has 624 divisors, whose sum is σ = 158965685760. Its totient is φ = 20065812480.

The previous prime is 56861249519. The next prime is 56861249537. The reversal of 56861249536 is 63594216865.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56861249537) 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, 1536790510 + ... + 1536790546.

Almost surely, 2^56861249536 is an apocalyptic number.

56861249536 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 56861249536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79482842880).

56861249536 is an abundant number, since it is smaller than the sum of its proper divisors (102104436224).

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

56861249536 is a wasteful number, since it uses less digits than its factorization.

56861249536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 109 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 55.

The spelling of 56861249536 in words is "fifty-six billion, eight hundred sixty-one million, two hundred forty-nine thousand, five hundred thirty-six".