161265630 has 16 divisors (see below), whose sum is σ = 387037584. Its totient is φ = 43004160.

The previous prime is 161265617. The next prime is 161265649. The reversal of 161265630 is 36562161.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 5375521 = 161265630 / (1 + 6 + 1 + 2 + 6 + 5 + 6 + 3 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2687731 + ... + 2687790.

It is an arithmetic number, because the mean of its divisors is an integer number (24189849).

Almost surely, 2^161265630 is an apocalyptic number.

161265630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161265630 is an abundant number, since it is smaller than the sum of its proper divisors (225771954).

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

161265630 is a wasteful number, since it uses less digits than its factorization.

161265630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5375531.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 161265630 is about 12699.0405149366. The cubic root of 161265630 is about 544.3112023272.

The spelling of 161265630 in words is "one hundred sixty-one million, two hundred sixty-five thousand, six hundred thirty".