37638161 has 8 divisors (see below), whose sum is σ = 41140224. Its totient is φ = 34149520.

The previous prime is 37638149. The next prime is 37638173. The reversal of 37638161 is 16183673.

It is an interprime number because it is at equal distance from previous prime (37638149) and next prime (37638173).

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 37638161 - 2¹⁰ = 37637137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37638131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3056 + ... + 9198.

It is an arithmetic number, because the mean of its divisors is an integer number (5142528).

Almost surely, 2^37638161 is an apocalyptic number.

It is an amenable number.

37638161 is a deficient number, since it is larger than the sum of its proper divisors (3502063).

37638161 is a wasteful number, since it uses less digits than its factorization.

37638161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6711.

The product of its digits is 18144, while the sum is 35.

The square root of 37638161 is about 6134.9947840239. The cubic root of 37638161 is about 335.1270358036.

The spelling of 37638161 in words is "thirty-seven million, six hundred thirty-eight thousand, one hundred sixty-one".