161287743456 has 96 divisors (see below), whose sum is σ = 537625831680. Its totient is φ = 46082210688.

The previous prime is 161287743443. The next prime is 161287743467. The reversal of 161287743456 is 654347782161.

161287743456 is a `hidden beast` number, since 1 + 61 + 28 + 77 + 43 + 456 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 13327926 + ... + 13340021.

It is an arithmetic number, because the mean of its divisors is an integer number (5600269080).

Almost surely, 2^161287743456 is an apocalyptic number.

161287743456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161287743456 is an abundant number, since it is smaller than the sum of its proper divisors (376338088224).

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

161287743456 is a wasteful number, since it uses less digits than its factorization.

161287743456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26667973 (or 26667959 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 54.

The spelling of 161287743456 in words is "one hundred sixty-one billion, two hundred eighty-seven million, seven hundred forty-three thousand, four hundred fifty-six".