551115153551 has 4 divisors (see below), whose sum is σ = 552430464600. Its totient is φ = 549799842504.

The previous prime is 551115153529. The next prime is 551115153553. The reversal of 551115153551 is 155351511155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155351511155 = 5 ⋅31070302231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551115153551 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 (551115153553) 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, 657654896 + ... + 657655733.

It is an arithmetic number, because the mean of its divisors is an integer number (138107616150).

Almost surely, 2^551115153551 is an apocalyptic number.

551115153551 is a deficient number, since it is larger than the sum of its proper divisors (1315311049).

551115153551 is a wasteful number, since it uses less digits than its factorization.

551115153551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315311048.

The product of its digits is 46875, while the sum is 38.

The spelling of 551115153551 in words is "five hundred fifty-one billion, one hundred fifteen million, one hundred fifty-three thousand, five hundred fifty-one".