551545455157 has 4 divisors (see below), whose sum is σ = 551597366176. Its totient is φ = 551493544140.

The previous prime is 551545455143. The next prime is 551545455193. The reversal of 551545455157 is 751554545155.

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 551545455157 - 2¹⁹ = 551544930869 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 (551545455107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25939569 + ... + 25960822.

It is an arithmetic number, because the mean of its divisors is an integer number (137899341544).

Almost surely, 2^551545455157 is an apocalyptic number.

It is an amenable number.

551545455157 is a deficient number, since it is larger than the sum of its proper divisors (51911019).

551545455157 is a wasteful number, since it uses less digits than its factorization.

551545455157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51911018.

The product of its digits is 8750000, while the sum is 52.

The spelling of 551545455157 in words is "five hundred fifty-one billion, five hundred forty-five million, four hundred fifty-five thousand, one hundred fifty-seven".