231553935481647 has 32 divisors (see below), whose sum is σ = 325087773748416. Its totient is φ = 146454963200000.

The previous prime is 231553935481573. The next prime is 231553935481669. The reversal of 231553935481647 is 746184539355132.

It is a cyclic number.

It is not a de Polignac number, because 231553935481647 - 2²⁷ = 231553801263919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231553935481747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156430854 + ... + 157904147.

It is an arithmetic number, because the mean of its divisors is an integer number (10158992929638).

Almost surely, 2^{231553935481647} is an apocalyptic number.

231553935481647 is a deficient number, since it is larger than the sum of its proper divisors (93533838266769).

231553935481647 is a wasteful number, since it uses less digits than its factorization.

231553935481647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314335211.

The product of its digits is 326592000, while the sum is 66.

The spelling of 231553935481647 in words is "two hundred thirty-one trillion, five hundred fifty-three billion, nine hundred thirty-five million, four hundred eighty-one thousand, six hundred forty-seven".