55877577856 has 64 divisors (see below), whose sum is σ = 113734471680. Its totient is φ = 27338508288.

The previous prime is 55877577853. The next prime is 55877577863. The reversal of 55877577856 is 65877577855.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (55877577853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1163145 + ... + 1210231.

It is an arithmetic number, because the mean of its divisors is an integer number (1777101120).

Almost surely, 2^55877577856 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 55877577856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56867235840).

55877577856 is an abundant number, since it is smaller than the sum of its proper divisors (57856893824).

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

55877577856 is a wasteful number, since it uses less digits than its factorization.

55877577856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47301 (or 47289 counting only the distinct ones).

The product of its digits is 576240000, while the sum is 70.

Subtracting 55877577856 from its reverse (65877577855), we obtain a palindrome (9999999999).

The spelling of 55877577856 in words is "fifty-five billion, eight hundred seventy-seven million, five hundred seventy-seven thousand, eight hundred fifty-six".