12401553465 has 64 divisors (see below), whose sum is σ = 26679006720. Its totient is φ = 5335787520.

The previous prime is 12401553421. The next prime is 12401553469. The reversal of 12401553465 is 56435510421.

12401553465 is a `hidden beast` number, since 1 + 2 + 40 + 1 + 553 + 4 + 65 = 666.

It is not a de Polignac number, because 12401553465 - 2⁸ = 12401553209 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12401553469) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 369916 + ... + 402045.

It is an arithmetic number, because the mean of its divisors is an integer number (416859480).

Almost surely, 2^12401553465 is an apocalyptic number.

12401553465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12401553465 is an abundant number, since it is smaller than the sum of its proper divisors (14277453255).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12401553465 is a wasteful number, since it uses less digits than its factorization.

12401553465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771999 (or 771993 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 12401553465 in words is "twelve billion, four hundred one million, five hundred fifty-three thousand, four hundred sixty-five".