161390264 has 32 divisors (see below), whose sum is σ = 360875520. Its totient is φ = 66159456.

The previous prime is 161390261. The next prime is 161390291. The reversal of 161390264 is 462093161.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 161390264.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161390261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61364 + ... + 63939.

It is an arithmetic number, because the mean of its divisors is an integer number (11277360).

Almost surely, 2^161390264 is an apocalyptic number.

161390264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161390264 is an abundant number, since it is smaller than the sum of its proper divisors (199485256).

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

161390264 is a wasteful number, since it uses less digits than its factorization.

161390264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125339 (or 125335 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 161390264 is about 12703.9467883017. The cubic root of 161390264 is about 544.4513896965.

The spelling of 161390264 in words is "one hundred sixty-one million, three hundred ninety thousand, two hundred sixty-four".