55555055491 has 24 divisors (see below), whose sum is σ = 63497310720. Its totient is φ = 48449153376.

The previous prime is 55555055477. The next prime is 55555055503. The reversal of 55555055491 is 19455055555.

It is not a de Polignac number, because 55555055491 - 2¹⁷ = 55554924419 is a prime.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55555055401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1154866 + ... + 1202008.

It is an arithmetic number, because the mean of its divisors is an integer number (2645721280).

Almost surely, 2^55555055491 is an apocalyptic number.

55555055491 is a deficient number, since it is larger than the sum of its proper divisors (7942255229).

55555055491 is a wasteful number, since it uses less digits than its factorization.

55555055491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47555 (or 47542 counting only the distinct ones).

The product of its (nonzero) digits is 2812500, while the sum is 49.

The spelling of 55555055491 in words is "fifty-five billion, five hundred fifty-five million, fifty-five thousand, four hundred ninety-one".