161061986245680 has 1920 divisors, whose sum is σ = 669823780534272. Its totient is φ = 35563356094464.

The previous prime is 161061986245673. The next prime is 161061986245873. The reversal of 161061986245680 is 86542689160161.

161061986245680 is a `hidden beast` number, since 1 + 6 + 1 + 0 + 6 + 1 + 9 + 8 + 62 + 4 + 568 + 0 = 666.

It is a super-2 number, since 2×161061986245680² (a number of 29 digits) contains 22 as substring.

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, 28952358579 + ... + 28952364141.

Almost surely, 2^{161061986245680} is an apocalyptic number.

161061986245680 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 161061986245680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334911890267136).

161061986245680 is an abundant number, since it is smaller than the sum of its proper divisors (508761794288592).

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

161061986245680 is a wasteful number, since it uses less digits than its factorization.

161061986245680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5937 (or 5919 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 63.

The spelling of 161061986245680 in words is "one hundred sixty-one trillion, sixty-one billion, nine hundred eighty-six million, two hundred forty-five thousand, six hundred eighty".