164139560 has 48 divisors (see below), whose sum is σ = 399924540. Its totient is φ = 60602880.

The previous prime is 164139559. The next prime is 164139587. The reversal of 164139560 is 65931461.

It can be written as a sum of positive squares in 6 ways, for example, as 54434884 + 109704676 = 7378^2 + 10474^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 164139560.

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, 5381 + ... + 18900.

Almost surely, 2^164139560 is an apocalyptic number.

164139560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164139560 is an abundant number, since it is smaller than the sum of its proper divisors (235784980).

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

164139560 is a wasteful number, since it uses less digits than its factorization.

164139560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24318 (or 24301 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 164139560 is about 12811.6962186902. The cubic root of 164139560 is about 547.5255897355.

The spelling of 164139560 in words is "one hundred sixty-four million, one hundred thirty-nine thousand, five hundred sixty".