551615555157 has 4 divisors (see below), whose sum is σ = 735487406880. Its totient is φ = 367743703436.

The previous prime is 551615555149. The next prime is 551615555167. The reversal of 551615555157 is 751555516155.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 551615555157 - 2³ = 551615555149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551615555107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91935925857 + ... + 91935925862.

It is an arithmetic number, because the mean of its divisors is an integer number (183871851720).

Almost surely, 2^551615555157 is an apocalyptic number.

It is an amenable number.

551615555157 is a deficient number, since it is larger than the sum of its proper divisors (183871851723).

551615555157 is a wasteful number, since it uses less digits than its factorization.

551615555157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183871851722.

The product of its digits is 3281250, while the sum is 51.

The spelling of 551615555157 in words is "five hundred fifty-one billion, six hundred fifteen million, five hundred fifty-five thousand, one hundred fifty-seven".