161315156160 has 168 divisors, whose sum is σ = 559227142656. Its totient is φ = 42678558720.

The previous prime is 161315156153. The next prime is 161315156179. The reversal of 161315156160 is 61651513161.

161315156160 is a `hidden beast` number, since 1 + 6 + 1 + 31 + 5 + 1 + 5 + 616 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 145240 + ... + 586280.

It is an arithmetic number, because the mean of its divisors is an integer number (3328732992).

Almost surely, 2^161315156160 is an apocalyptic number.

161315156160 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 161315156160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279613571328).

161315156160 is an abundant number, since it is smaller than the sum of its proper divisors (397911986496).

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

161315156160 is a wasteful number, since it uses less digits than its factorization.

161315156160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441191 (or 441178 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The spelling of 161315156160 in words is "one hundred sixty-one billion, three hundred fifteen million, one hundred fifty-six thousand, one hundred sixty".