161515791360 has 1056 divisors, whose sum is σ = 712749024000. Its totient is φ = 33525596160.

The previous prime is 161515791341. The next prime is 161515791361. The reversal of 161515791360 is 63197515161.

161515791360 is a `hidden beast` number, since 1 + 6 + 1 + 5 + 1 + 579 + 13 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (1056).

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

It is not an unprimeable number, because it can be changed into a prime (161515791361) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 173859376 + ... + 173860304.

Almost surely, 2^161515791360 is an apocalyptic number.

161515791360 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 161515791360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356374512000).

161515791360 is an abundant number, since it is smaller than the sum of its proper divisors (551233232640).

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

161515791360 is a wasteful number, since it uses less digits than its factorization.

161515791360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992 (or 957 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 45.

The spelling of 161515791360 in words is "one hundred sixty-one billion, five hundred fifteen million, seven hundred ninety-one thousand, three hundred sixty".