55777555504 has 120 divisors (see below), whose sum is σ = 128443207680. Its totient is φ = 23243414400.

The previous prime is 55777555459. The next prime is 55777555511. The reversal of 55777555504 is 40555577755.

It is a happy number.

It is a super-2 number, since 2×55777555504² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1955457 + ... + 1983775.

It is an arithmetic number, because the mean of its divisors is an integer number (1070360064).

Almost surely, 2^55777555504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55777555504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64221603840).

55777555504 is an abundant number, since it is smaller than the sum of its proper divisors (72665652176).

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

55777555504 is a wasteful number, since it uses less digits than its factorization.

55777555504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28407 (or 28382 counting only the distinct ones).

The product of its (nonzero) digits is 21437500, while the sum is 55.

The spelling of 55777555504 in words is "fifty-five billion, seven hundred seventy-seven million, five hundred fifty-five thousand, five hundred four".