161061939360 has 288 divisors, whose sum is σ = 632307416832. Its totient is φ = 36570009600.

The previous prime is 161061939341. The next prime is 161061939377. The reversal of 161061939360 is 63939160161.

It is a happy number.

161061939360 is a `hidden beast` number, since 16 + 10 + 619 + 3 + 9 + 3 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1469172 + ... + 1574988.

It is an arithmetic number, because the mean of its divisors is an integer number (2195511864).

Almost surely, 2^161061939360 is an apocalyptic number.

161061939360 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 161061939360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316153708416).

161061939360 is an abundant number, since it is smaller than the sum of its proper divisors (471245477472).

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

161061939360 is a wasteful number, since it uses less digits than its factorization.

161061939360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105996 (or 105985 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The spelling of 161061939360 in words is "one hundred sixty-one billion, sixty-one million, nine hundred thirty-nine thousand, three hundred sixty".