161263561452 has 96 divisors (see below), whose sum is σ = 431736582144. Its totient is φ = 45893390400.

The previous prime is 161263561451. The next prime is 161263561463. The reversal of 161263561452 is 254165362161.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (161263561451) 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, 41231377 + ... + 41235287.

It is an arithmetic number, because the mean of its divisors is an integer number (4497256064).

Almost surely, 2^161263561452 is an apocalyptic number.

161263561452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161263561452 is an abundant number, since it is smaller than the sum of its proper divisors (270473020692).

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

161263561452 is a wasteful number, since it uses less digits than its factorization.

161263561452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5739 (or 5737 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The spelling of 161263561452 in words is "one hundred sixty-one billion, two hundred sixty-three million, five hundred sixty-one thousand, four hundred fifty-two".