161515015275 has 24 divisors (see below), whose sum is σ = 267101386560. Its totient is φ = 86120945440.

The previous prime is 161515015247. The next prime is 161515015309. The reversal of 161515015275 is 572510515161.

It is a happy number.

161515015275 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161515015275 - 2¹⁰ = 161515014251 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66604 + ... + 572246.

It is an arithmetic number, because the mean of its divisors is an integer number (11129224440).

Almost surely, 2^161515015275 is an apocalyptic number.

161515015275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161515015275 is a deficient number, since it is larger than the sum of its proper divisors (105586371285).

161515015275 is a wasteful number, since it uses less digits than its factorization.

161515015275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509915 (or 509910 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 39.

The spelling of 161515015275 in words is "one hundred sixty-one billion, five hundred fifteen million, fifteen thousand, two hundred seventy-five".