161925130195920 has 960 divisors, whose sum is σ = 689918726375424. Its totient is φ = 33118265180160.

The previous prime is 161925130195919. The next prime is 161925130195963. The reversal of 161925130195920 is 29591031529161.

161925130195920 is a `hidden beast` number, since 1 + 6 + 1 + 9 + 2 + 5 + 1 + 30 + 19 + 592 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 656845804 + ... + 657092276.

Almost surely, 2^{161925130195920} is an apocalyptic number.

161925130195920 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 161925130195920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344959363187712).

161925130195920 is an abundant number, since it is smaller than the sum of its proper divisors (527993596179504).

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

161925130195920 is a wasteful number, since it uses less digits than its factorization.

161925130195920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246820 (or 246811 counting only the distinct ones).

The product of its (nonzero) digits is 1312200, while the sum is 54.

The spelling of 161925130195920 in words is "one hundred sixty-one trillion, nine hundred twenty-five billion, one hundred thirty million, one hundred ninety-five thousand, nine hundred twenty".