55520018500 has 48 divisors (see below), whose sum is σ = 122210629632. Its totient is φ = 22033116000.

The previous prime is 55520018471. The next prime is 55520018501. The reversal of 55520018500 is 581002555.

It is not an unprimeable number, because it can be changed into a prime (55520018501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373666 + ... + 500665.

It is an arithmetic number, because the mean of its divisors is an integer number (2546054784).

Almost surely, 2^55520018500 is an apocalyptic number.

55520018500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55520018500 is an abundant number, since it is smaller than the sum of its proper divisors (66690611132).

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

55520018500 is a wasteful number, since it uses less digits than its factorization.

55520018500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874477 (or 874465 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 31.

The spelling of 55520018500 in words is "fifty-five billion, five hundred twenty million, eighteen thousand, five hundred".