55551050591 has 2 divisors, whose sum is σ = 55551050592. Its totient is φ = 55551050590.

The previous prime is 55551050567. The next prime is 55551050623. The reversal of 55551050591 is 19505015555.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55551050591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55551050561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27775525295 + 27775525296.

It is an arithmetic number, because the mean of its divisors is an integer number (27775525296).

Almost surely, 2^55551050591 is an apocalyptic number.

55551050591 is a deficient number, since it is larger than the sum of its proper divisors (1).

55551050591 is an equidigital number, since it uses as much as digits as its factorization.

55551050591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140625, while the sum is 41.

The spelling of 55551050591 in words is "fifty-five billion, five hundred fifty-one million, fifty thousand, five hundred ninety-one".