55815591750 has 32 divisors (see below), whose sum is σ = 139315718880. Its totient is φ = 14884157600.

The previous prime is 55815591743. The next prime is 55815591773. The reversal of 55815591750 is 5719551855.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 55815591693 and 55815591702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37209645 + ... + 37211144.

It is an arithmetic number, because the mean of its divisors is an integer number (4353616215).

Almost surely, 2^55815591750 is an apocalyptic number.

55815591750 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55815591750 is an abundant number, since it is smaller than the sum of its proper divisors (83500127130).

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

55815591750 is a wasteful number, since it uses less digits than its factorization.

55815591750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74420809 (or 74420799 counting only the distinct ones).

The product of its (nonzero) digits is 1575000, while the sum is 51.

The spelling of 55815591750 in words is "fifty-five billion, eight hundred fifteen million, five hundred ninety-one thousand, seven hundred fifty".