55500018772 has 24 divisors (see below), whose sum is σ = 106295297472. Its totient is φ = 25146158400.

The previous prime is 55500018751. The next prime is 55500018803. The reversal of 55500018772 is 27781000555.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2014233 + ... + 2041600.

It is an arithmetic number, because the mean of its divisors is an integer number (4428970728).

Almost surely, 2^55500018772 is an apocalyptic number.

It is an amenable number.

55500018772 is a deficient number, since it is larger than the sum of its proper divisors (50795278700).

55500018772 is a wasteful number, since it uses less digits than its factorization.

55500018772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4056159 (or 4056157 counting only the distinct ones).

The product of its (nonzero) digits is 98000, while the sum is 40.

The spelling of 55500018772 in words is "fifty-five billion, five hundred million, eighteen thousand, seven hundred seventy-two".