161579145 has 32 divisors (see below), whose sum is σ = 318189312. Its totient is φ = 68182272.

The previous prime is 161579141. The next prime is 161579147. The reversal of 161579145 is 541975161.

It is not a de Polignac number, because 161579145 - 2² = 161579141 is a prime.

It is a super-2 number, since 2×161579145² = 52215640197862050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (161579141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57822 + ... + 60551.

It is an arithmetic number, because the mean of its divisors is an integer number (9943416).

Almost surely, 2^161579145 is an apocalyptic number.

161579145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161579145 is a deficient number, since it is larger than the sum of its proper divisors (156610167).

161579145 is a wasteful number, since it uses less digits than its factorization.

161579145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118401.

The product of its digits is 37800, while the sum is 39.

The square root of 161579145 is about 12711.3785641055. The cubic root of 161579145 is about 544.6637040965.

The spelling of 161579145 in words is "one hundred sixty-one million, five hundred seventy-nine thousand, one hundred forty-five".