551245444542155 has 48 divisors (see below), whose sum is σ = 729782147740800. Its totient is φ = 399427304474880.

The previous prime is 551245444542127. The next prime is 551245444542173.

551245444542155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 551245444542155 - 2¹⁰ = 551245444541131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551245444542155.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 255042734 + ... + 257195036.

It is an arithmetic number, because the mean of its divisors is an integer number (15203794744600).

Almost surely, 2^{551245444542155} is an apocalyptic number.

551245444542155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

551245444542155 is a deficient number, since it is larger than the sum of its proper divisors (178536703198645).

551245444542155 is a wasteful number, since it uses less digits than its factorization.

551245444542155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153892 (or 2153881 counting only the distinct ones).

The product of its digits is 64000000, while the sum is 56.

The spelling of 551245444542155 in words is "five hundred fifty-one trillion, two hundred forty-five billion, four hundred forty-four million, five hundred forty-two thousand, one hundred fifty-five".