56998805406 has 64 divisors (see below), whose sum is σ = 119192496192. Its totient is φ = 18155520000.

The previous prime is 56998805329. The next prime is 56998805407. The reversal of 56998805406 is 60450889965.

It is a super-2 number, since 2×56998805406² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56998805406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56998805407) 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, 3608566 + ... + 3624326.

It is an arithmetic number, because the mean of its divisors is an integer number (1862382753).

Almost surely, 2^56998805406 is an apocalyptic number.

56998805406 is an abundant number, since it is smaller than the sum of its proper divisors (62193690786).

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

56998805406 is a wasteful number, since it uses less digits than its factorization.

56998805406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16109.

The product of its (nonzero) digits is 18662400, while the sum is 60.

The spelling of 56998805406 in words is "fifty-six billion, nine hundred ninety-eight million, eight hundred five thousand, four hundred six".