53111511551 has 8 divisors (see below), whose sum is σ = 61937623200. Its totient is φ = 45524152464.

The previous prime is 53111511527. The next prime is 53111511553. The reversal of 53111511551 is 15511511135.

It is not a de Polignac number, because 53111511551 - 2³⁰ = 52037769727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53111511553) 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 7 ways as a sum of consecutive naturals, for example, 77421686 + ... + 77422371.

It is an arithmetic number, because the mean of its divisors is an integer number (7742202900).

Almost surely, 2^53111511551 is an apocalyptic number.

53111511551 is a deficient number, since it is larger than the sum of its proper divisors (8826111649).

53111511551 is an equidigital number, since it uses as much as digits as its factorization.

53111511551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154844078 (or 154844064 counting only the distinct ones).

The product of its digits is 1875, while the sum is 29.

The spelling of 53111511551 in words is "fifty-three billion, one hundred eleven million, five hundred eleven thousand, five hundred fifty-one".