55775922081 has 32 divisors (see below), whose sum is σ = 87898618368. Its totient is φ = 31075242240.

The previous prime is 55775922067. The next prime is 55775922089. The reversal of 55775922081 is 18022957755.

It is not a de Polignac number, because 55775922081 - 2⁷ = 55775921953 is a prime.

It is a super-2 number, since 2×55775922081² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (55775922089) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1131951 + ... + 1180196.

It is an arithmetic number, because the mean of its divisors is an integer number (2746831824).

Almost surely, 2^55775922081 is an apocalyptic number.

55775922081 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

55775922081 is a deficient number, since it is larger than the sum of its proper divisors (32122696287).

55775922081 is a wasteful number, since it uses less digits than its factorization.

55775922081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2312221.

The product of its (nonzero) digits is 1764000, while the sum is 51.

The spelling of 55775922081 in words is "fifty-five billion, seven hundred seventy-five million, nine hundred twenty-two thousand, eighty-one".