161625415 has 8 divisors (see below), whose sum is σ = 221657760. Its totient is φ = 110828832.

The previous prime is 161625397. The next prime is 161625463. The reversal of 161625415 is 514526161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161625415 - 2⁵ = 161625383 is a prime.

It is a super-2 number, since 2×161625415² = 52245549547844450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2308900 + ... + 2308969.

It is an arithmetic number, because the mean of its divisors is an integer number (27707220).

Almost surely, 2^161625415 is an apocalyptic number.

161625415 is a deficient number, since it is larger than the sum of its proper divisors (60032345).

161625415 is an equidigital number, since it uses as much as digits as its factorization.

161625415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4617881.

The product of its digits is 7200, while the sum is 31.

The square root of 161625415 is about 12713.1984567221. The cubic root of 161625415 is about 544.7156893210.

The spelling of 161625415 in words is "one hundred sixty-one million, six hundred twenty-five thousand, four hundred fifteen".