16161597 has 6 divisors (see below), whose sum is σ = 23344542. Its totient is φ = 10774392.

The previous prime is 16161589. The next prime is 16161623. The reversal of 16161597 is 79516161.

It is a happy number.

16161597 is a `hidden beast` number, since 1 + 6 + 1 + 61 + 597 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8259876 + 7901721 = 2874^2 + 2811^2 .

It is not a de Polignac number, because 16161597 - 2³ = 16161589 is a prime.

It is a super-2 number, since 2×16161597² = 522394435180818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16161527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 897858 + ... + 897875.

It is an arithmetic number, because the mean of its divisors is an integer number (3890757).

Almost surely, 2^16161597 is an apocalyptic number.

It is an amenable number.

16161597 is a deficient number, since it is larger than the sum of its proper divisors (7182945).

16161597 is a wasteful number, since it uses less digits than its factorization.

16161597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795739 (or 1795736 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 16161597 is about 4020.1488778402. The cubic root of 16161597 is about 252.8297009931.

The spelling of 16161597 in words is "sixteen million, one hundred sixty-one thousand, five hundred ninety-seven".