56165043022640 has 160 divisors (see below), whose sum is σ = 133412521784256. Its totient is φ = 21981739253760.

The previous prime is 56165043022637. The next prime is 56165043022643. The reversal of 56165043022640 is 4622034056165.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56165043022637) and next prime (56165043022643).

It is a junction number, because it is equal to n+sod(n) for n = 56165043022591 and 56165043022600.

It is not an unprimeable number, because it can be changed into a prime (56165043022643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2865115079 + ... + 2865134681.

Almost surely, 2^{56165043022640} 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 56165043022640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66706260892128).

56165043022640 is an abundant number, since it is smaller than the sum of its proper divisors (77247478761616).

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

56165043022640 is a wasteful number, since it uses less digits than its factorization.

56165043022640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21487 (or 21481 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 56165043022640 in words is "fifty-six trillion, one hundred sixty-five billion, forty-three million, twenty-two thousand, six hundred forty".