56558231890 has 8 divisors (see below), whose sum is σ = 101804817420. Its totient is φ = 22623292752.

The previous prime is 56558231861. The next prime is 56558231909. The reversal of 56558231890 is 9813285565.

It can be written as a sum of positive squares in 2 ways, for example, as 52492766769 + 4065465121 = 229113^2 + 63761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2827911585 + ... + 2827911604.

Almost surely, 2^56558231890 is an apocalyptic number.

56558231890 is a deficient number, since it is larger than the sum of its proper divisors (45246585530).

56558231890 is a wasteful number, since it uses less digits than its factorization.

56558231890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5655823196.

The product of its (nonzero) digits is 2592000, while the sum is 52.

The spelling of 56558231890 in words is "fifty-six billion, five hundred fifty-eight million, two hundred thirty-one thousand, eight hundred ninety".