55292885981 has 4 divisors (see below), whose sum is σ = 56230053600. Its totient is φ = 54355718364.

The previous prime is 55292885957. The next prime is 55292886007. The reversal of 55292885981 is 18958829255.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55292885981 is a prime.

It is a super-2 number, since 2×55292885981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55292885281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468583721 + ... + 468583838.

It is an arithmetic number, because the mean of its divisors is an integer number (14057513400).

Almost surely, 2^55292885981 is an apocalyptic number.

It is an amenable number.

55292885981 is a deficient number, since it is larger than the sum of its proper divisors (937167619).

55292885981 is an equidigital number, since it uses as much as digits as its factorization.

55292885981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937167618.

The product of its digits is 20736000, while the sum is 62.

The spelling of 55292885981 in words is "fifty-five billion, two hundred ninety-two million, eight hundred eighty-five thousand, nine hundred eighty-one".