161545222275 has 12 divisors (see below), whose sum is σ = 267088100952. Its totient is φ = 86157451840.

The previous prime is 161545222217. The next prime is 161545222301. The reversal of 161545222275 is 572222545161.

It is not a de Polignac number, because 161545222275 - 2⁹ = 161545221763 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1076968074 + ... + 1076968223.

It is an arithmetic number, because the mean of its divisors is an integer number (22257341746).

Almost surely, 2^161545222275 is an apocalyptic number.

161545222275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161545222275 is a deficient number, since it is larger than the sum of its proper divisors (105542878677).

161545222275 is a wasteful number, since it uses less digits than its factorization.

161545222275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153936310 (or 2153936305 counting only the distinct ones).

The product of its digits is 336000, while the sum is 42.

The spelling of 161545222275 in words is "one hundred sixty-one billion, five hundred forty-five million, two hundred twenty-two thousand, two hundred seventy-five".