36640191 has 12 divisors (see below), whose sum is σ = 56829912. Its totient is φ = 20937168.

The previous prime is 36640181. The next prime is 36640193. The reversal of 36640191 is 19104663.

It is not a de Polignac number, because 36640191 - 2⁵ = 36640159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36640193) 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, 124480 + ... + 124773.

It is an arithmetic number, because the mean of its divisors is an integer number (4735826).

Almost surely, 2^36640191 is an apocalyptic number.

36640191 is a deficient number, since it is larger than the sum of its proper divisors (20189721).

36640191 is a wasteful number, since it uses less digits than its factorization.

36640191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249270 (or 249263 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 36640191 is about 6053.1141571921. The cubic root of 36640191 is about 332.1385175853.

The spelling of 36640191 in words is "thirty-six million, six hundred forty thousand, one hundred ninety-one".