161560260 has 36 divisors (see below), whose sum is σ = 490066668. Its totient is φ = 43082688.

The previous prime is 161560237. The next prime is 161560277. The reversal of 161560260 is 62065161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27185796 + 134374464 = 5214^2 + 11592^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×161560260² = 52203435222535200, which contains 22 as substring.

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, 448599 + ... + 448958.

It is an arithmetic number, because the mean of its divisors is an integer number (13612963).

Almost surely, 2^161560260 is an apocalyptic number.

161560260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161560260 is an abundant number, since it is smaller than the sum of its proper divisors (328506408).

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

161560260 is a wasteful number, since it uses less digits than its factorization.

161560260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897572 (or 897567 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 161560260 is about 12710.6357040079. The cubic root of 161560260 is about 544.6424835881.

The spelling of 161560260 in words is "one hundred sixty-one million, five hundred sixty thousand, two hundred sixty".