55951730891 has 24 divisors (see below), whose sum is σ = 67761663840. Its totient is φ = 46023126912.

The previous prime is 55951730867. The next prime is 55951730909. The reversal of 55951730891 is 19803715955.

It is not a de Polignac number, because 55951730891 - 2³⁴ = 38771861707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55951730851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79031 + ... + 343728.

It is an arithmetic number, because the mean of its divisors is an integer number (2823402660).

Almost surely, 2^55951730891 is an apocalyptic number.

55951730891 is a deficient number, since it is larger than the sum of its proper divisors (11809932949).

55951730891 is a wasteful number, since it uses less digits than its factorization.

55951730891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422883 (or 422876 counting only the distinct ones).

The product of its (nonzero) digits is 1701000, while the sum is 53.

The spelling of 55951730891 in words is "fifty-five billion, nine hundred fifty-one million, seven hundred thirty thousand, eight hundred ninety-one".