161560710769920 has 3456 divisors, whose sum is σ = 725202461491200. Its totient is φ = 29689970688000.

The previous prime is 161560710769907. The next prime is 161560710769979. The reversal of 161560710769920 is 29967017065161.

It is a super-2 number, since 2×161560710769920² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 245160410551 + ... + 245160411209.

It is an arithmetic number, because the mean of its divisors is an integer number (209838675200).

Almost surely, 2^{161560710769920} is an apocalyptic number.

161560710769920 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 161560710769920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362601230745600).

161560710769920 is an abundant number, since it is smaller than the sum of its proper divisors (563641750721280).

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

161560710769920 is a wasteful number, since it uses less digits than its factorization.

161560710769920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 874 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 60.

The spelling of 161560710769920 in words is "one hundred sixty-one trillion, five hundred sixty billion, seven hundred ten million, seven hundred sixty-nine thousand, nine hundred twenty".