531661418355 has 16 divisors (see below), whose sum is σ = 850723386624. Its totient is φ = 283531050720.

The previous prime is 531661418311. The next prime is 531661418371. The reversal of 531661418355 is 553814166135.

It is not a de Polignac number, because 531661418355 - 2⁶ = 531661418291 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1153141 + ... + 1546950.

It is an arithmetic number, because the mean of its divisors is an integer number (53170211664).

Almost surely, 2^531661418355 is an apocalyptic number.

531661418355 is a deficient number, since it is larger than the sum of its proper divisors (319061968269).

531661418355 is a wasteful number, since it uses less digits than its factorization.

531661418355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2713226.

The product of its digits is 1296000, while the sum is 48.

The spelling of 531661418355 in words is "five hundred thirty-one billion, six hundred sixty-one million, four hundred eighteen thousand, three hundred fifty-five".