161738037 has 12 divisors (see below), whose sum is σ = 235304160. Its totient is φ = 107048808.

The previous prime is 161738021. The next prime is 161738039. The reversal of 161738037 is 730837161.

161738037 is a `hidden beast` number, since 1 + 617 + 3 + 8 + 0 + 37 = 666.

It is not a de Polignac number, because 161738037 - 2⁴ = 161738021 is a prime.

It is a super-2 number, since 2×161738037² = 52318385225226738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161737992 and 161738010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161738039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63393 + ... + 65894.

It is an arithmetic number, because the mean of its divisors is an integer number (19608680).

Almost surely, 2^161738037 is an apocalyptic number.

It is an amenable number.

161738037 is a deficient number, since it is larger than the sum of its proper divisors (73566123).

161738037 is a wasteful number, since it uses less digits than its factorization.

161738037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129432 (or 129429 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 161738037 is about 12717.6270192202. The cubic root of 161738037 is about 544.8421808278.

The spelling of 161738037 in words is "one hundred sixty-one million, seven hundred thirty-eight thousand, thirty-seven".