161072255600 has 120 divisors (see below), whose sum is σ = 396709379808. Its totient is φ = 62810726400.

The previous prime is 161072255563. The next prime is 161072255633. The reversal of 161072255600 is 6552270161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29140037 + ... + 29145563.

Almost surely, 2^161072255600 is an apocalyptic number.

161072255600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161072255600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198354689904).

161072255600 is an abundant number, since it is smaller than the sum of its proper divisors (235637124208).

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

161072255600 is a wasteful number, since it uses less digits than its factorization.

161072255600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7363 (or 7352 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 161072255600 in words is "one hundred sixty-one billion, seventy-two million, two hundred fifty-five thousand, six hundred".