231553935481649 has 32 divisors (see below), whose sum is σ = 260584719408000. Its totient is φ = 203903877450240.

The previous prime is 231553935481573. The next prime is 231553935481669. The reversal of 231553935481649 is 946184539355132.

It is not a de Polignac number, because 231553935481649 - 2²⁸ = 231553667046193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231553935481669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4509389027 + ... + 4509440375.

It is an arithmetic number, because the mean of its divisors is an integer number (8143272481500).

Almost surely, 2^{231553935481649} is an apocalyptic number.

It is an amenable number.

231553935481649 is a deficient number, since it is larger than the sum of its proper divisors (29030783926351).

231553935481649 is a wasteful number, since it uses less digits than its factorization.

231553935481649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100433.

The product of its digits is 419904000, while the sum is 68.

The spelling of 231553935481649 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-nine".