55998749730 has 128 divisors (see below), whose sum is σ = 173338030080. Its totient is φ = 11234845440.

The previous prime is 55998749693. The next prime is 55998749777. The reversal of 55998749730 is 3794789955.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 350974 + ... + 484953.

It is an arithmetic number, because the mean of its divisors is an integer number (1354203360).

Almost surely, 2^55998749730 is an apocalyptic number.

55998749730 is an abundant number, since it is smaller than the sum of its proper divisors (117339280350).

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

55998749730 is a wasteful number, since it uses less digits than its factorization.

55998749730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835984.

The product of its (nonzero) digits is 85730400, while the sum is 66.

The spelling of 55998749730 in words is "fifty-five billion, nine hundred ninety-eight million, seven hundred forty-nine thousand, seven hundred thirty".