55777555580 has 48 divisors (see below), whose sum is σ = 123352390560. Its totient is φ = 21127392000.

The previous prime is 55777555579. The next prime is 55777555583. The reversal of 55777555580 is 8555577755.

It is a super-3 number, since 3×55777555580³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55777555583) 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, 858230 + ... + 920930.

It is an arithmetic number, because the mean of its divisors is an integer number (2569841470).

Almost surely, 2^55777555580 is an apocalyptic number.

It is an amenable number.

55777555580 is an abundant number, since it is smaller than the sum of its proper divisors (67574834980).

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

55777555580 is a wasteful number, since it uses less digits than its factorization.

55777555580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65070 (or 65068 counting only the distinct ones).

The product of its (nonzero) digits is 42875000, while the sum is 59.

The spelling of 55777555580 in words is "fifty-five billion, seven hundred seventy-seven million, five hundred fifty-five thousand, five hundred eighty".