55186761880 has 16 divisors (see below), whose sum is σ = 124170214320. Its totient is φ = 22074704736.

The previous prime is 55186761869. The next prime is 55186761907. The reversal of 55186761880 is 8816768155.

It is a happy number.

It is a super-2 number, since 2×55186761880² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 689834484 + ... + 689834563.

It is an arithmetic number, because the mean of its divisors is an integer number (7760638395).

Almost surely, 2^55186761880 is an apocalyptic number.

It is an amenable number.

55186761880 is an abundant number, since it is smaller than the sum of its proper divisors (68983452440).

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

55186761880 is a wasteful number, since it uses less digits than its factorization.

55186761880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379669058 (or 1379669054 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 55.

The spelling of 55186761880 in words is "fifty-five billion, one hundred eighty-six million, seven hundred sixty-one thousand, eight hundred eighty".