56217893744640 has 416 divisors, whose sum is σ = 188433784627200. Its totient is φ = 14291234979840.

The previous prime is 56217893744489. The next prime is 56217893744657. The reversal of 56217893744640 is 4644739871265.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140559345 + ... + 140958735.

It is a 1-persistent number, because it is pandigital, but 2⋅56217893744640 = 112435787489280 is not.

Almost surely, 2^{56217893744640} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56217893744640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94216892313600).

56217893744640 is an abundant number, since it is smaller than the sum of its proper divisors (132215890882560).

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

56217893744640 is a wasteful number, since it uses less digits than its factorization.

56217893744640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399531 (or 399509 counting only the distinct ones).

The product of its (nonzero) digits is 243855360, while the sum is 66.

The spelling of 56217893744640 in words is "fifty-six trillion, two hundred seventeen billion, eight hundred ninety-three million, seven hundred forty-four thousand, six hundred forty".