551551405452523 has 4 divisors (see below), whose sum is σ = 630344463374320. Its totient is φ = 472758347530728.

The previous prime is 551551405452491. The next prime is 551551405452583. The reversal of 551551405452523 is 325254504155155.

It is a happy number.

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

It is not a de Polignac number, because 551551405452523 - 2⁵ = 551551405452491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551551405452583) 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, 39396528960888 + ... + 39396528960901.

It is an arithmetic number, because the mean of its divisors is an integer number (157586115843580).

Almost surely, 2^{551551405452523} is an apocalyptic number.

551551405452523 is a deficient number, since it is larger than the sum of its proper divisors (78793057921797).

551551405452523 is an equidigital number, since it uses as much as digits as its factorization.

551551405452523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78793057921796.

The product of its (nonzero) digits is 15000000, while the sum is 52.

The spelling of 551551405452523 in words is "five hundred fifty-one trillion, five hundred fifty-one billion, four hundred five million, four hundred fifty-two thousand, five hundred twenty-three".