16556157 has 10 divisors (see below), whose sum is σ = 24732158. Its totient is φ = 11037384.

The previous prime is 16556153. The next prime is 16556179. The reversal of 16556157 is 75165561.

It can be written as a sum of positive squares in only one way, i.e., 9696996 + 6859161 = 3114^2 + 2619^2 .

It is not a de Polignac number, because 16556157 - 2² = 16556153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16556153) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 102118 + ... + 102279.

Almost surely, 2^16556157 is an apocalyptic number.

It is an amenable number.

16556157 is a deficient number, since it is larger than the sum of its proper divisors (8176001).

16556157 is an equidigital number, since it uses as much as digits as its factorization.

16556157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204409 (or 204400 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 16556157 is about 4068.9257796131. The cubic root of 16556157 is about 254.8706610525.

The spelling of 16556157 in words is "sixteen million, five hundred fifty-six thousand, one hundred fifty-seven".