161627157 has 20 divisors (see below), whose sum is σ = 246005100. Its totient is φ = 105715584.

The previous prime is 161627131. The next prime is 161627161. The reversal of 161627157 is 751726161.

161627157 is a `hidden beast` number, since 1 + 616 + 27 + 15 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 139216401 + 22410756 = 11799^2 + 4734^2 .

It is not a de Polignac number, because 161627157 - 2¹⁰ = 161626133 is a prime.

It is a super-2 number, since 2×161627157² = 52246675759805298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161627107) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14532 + ... + 23117.

It is an arithmetic number, because the mean of its divisors is an integer number (12300255).

Almost surely, 2^161627157 is an apocalyptic number.

It is an amenable number.

161627157 is a deficient number, since it is larger than the sum of its proper divisors (84377943).

161627157 is an equidigital number, since it uses as much as digits as its factorization.

161627157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37714 (or 37705 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 161627157 is about 12713.2669680142. The cubic root of 161627157 is about 544.7176462973.

The spelling of 161627157 in words is "one hundred sixty-one million, six hundred twenty-seven thousand, one hundred fifty-seven".