551115711511 has 4 divisors (see below), whose sum is σ = 551119492224. Its totient is φ = 551111930800.

The previous prime is 551115711499. The next prime is 551115711521. The reversal of 551115711511 is 115117511155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551115711511 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 (551115711521) 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, 1662550 + ... + 1966291.

It is an arithmetic number, because the mean of its divisors is an integer number (137779873056).

Almost surely, 2^551115711511 is an apocalyptic number.

551115711511 is a deficient number, since it is larger than the sum of its proper divisors (3780713).

551115711511 is a wasteful number, since it uses less digits than its factorization.

551115711511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3780712.

The product of its digits is 4375, while the sum is 34.

The spelling of 551115711511 in words is "five hundred fifty-one billion, one hundred fifteen million, seven hundred eleven thousand, five hundred eleven".