161406615 has 32 divisors (see below), whose sum is σ = 280627200. Its totient is φ = 78917760.

The previous prime is 161406593. The next prime is 161406629. The reversal of 161406615 is 516604161.

It is not a de Polignac number, because 161406615 - 2⁹ = 161406103 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 300 + ... + 17969.

It is an arithmetic number, because the mean of its divisors is an integer number (8769600).

Almost surely, 2^161406615 is an apocalyptic number.

161406615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161406615 is a deficient number, since it is larger than the sum of its proper divisors (119220585).

161406615 is a wasteful number, since it uses less digits than its factorization.

161406615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18327.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 161406615 is about 12704.5903121667. The cubic root of 161406615 is about 544.4697758202.

The spelling of 161406615 in words is "one hundred sixty-one million, four hundred six thousand, six hundred fifteen".