3640985623 has 8 divisors (see below), whose sum is σ = 4031268480. Its totient is φ = 3260583480.

The previous prime is 3640985617. The next prime is 3640985657. The reversal of 3640985623 is 3265890463.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-3640985623 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 (3640982623) 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, 2469403 + ... + 2470876.

It is an arithmetic number, because the mean of its divisors is an integer number (503908560).

Almost surely, 2^3640985623 is an apocalyptic number.

3640985623 is a deficient number, since it is larger than the sum of its proper divisors (390282857).

3640985623 is a wasteful number, since it uses less digits than its factorization.

3640985623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940357.

The product of its (nonzero) digits is 933120, while the sum is 46.

The square root of 3640985623 is about 60340.5802342006. The cubic root of 3640985623 is about 1538.4131660259.

The spelling of 3640985623 in words is "three billion, six hundred forty million, nine hundred eighty-five thousand, six hundred twenty-three".