55029977856 has 576 divisors, whose sum is σ = 202189209600. Its totient is φ = 14407372800.

The previous prime is 55029977843. The next prime is 55029977897. The reversal of 55029977856 is 65877992055.

55029977856 is a `hidden beast` number, since 5 + 502 + 9 + 9 + 7 + 78 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 55029977793 and 55029977802.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28497211 + ... + 28499141.

Almost surely, 2^55029977856 is an apocalyptic number.

55029977856 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55029977856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101094604800).

55029977856 is an abundant number, since it is smaller than the sum of its proper divisors (147159231744).

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

55029977856 is a wasteful number, since it uses less digits than its factorization.

55029977856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2013 (or 1993 counting only the distinct ones).

The product of its (nonzero) digits is 47628000, while the sum is 63.

The spelling of 55029977856 in words is "fifty-five billion, twenty-nine million, nine hundred seventy-seven thousand, eight hundred fifty-six".