55111010551 has 4 divisors (see below), whose sum is σ = 55111610952. Its totient is φ = 55110410152.

The previous prime is 55111010543. The next prime is 55111010627. The reversal of 55111010551 is 15501011155.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 55111010551 - 2³ = 55111010543 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 (55111070551) 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, 130561 + ... + 356746.

It is an arithmetic number, because the mean of its divisors is an integer number (13777902738).

Almost surely, 2^55111010551 is an apocalyptic number.

55111010551 is a deficient number, since it is larger than the sum of its proper divisors (600401).

55111010551 is a wasteful number, since it uses less digits than its factorization.

55111010551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600400.

The product of its (nonzero) digits is 625, while the sum is 25.

The spelling of 55111010551 in words is "fifty-five billion, one hundred eleven million, ten thousand, five hundred fifty-one".