3640156635 has 8 divisors (see below), whose sum is σ = 5824250640. Its totient is φ = 1941416864.

The previous prime is 3640156631. The next prime is 3640156649. The reversal of 3640156635 is 5366510463.

It is a happy number.

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 3640156635 - 2² = 3640156631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3640156593 and 3640156602.

It is not an unprimeable number, because it can be changed into a prime (3640156631) 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, 121338540 + ... + 121338569.

It is an arithmetic number, because the mean of its divisors is an integer number (728031330).

Almost surely, 2^3640156635 is an apocalyptic number.

3640156635 is a deficient number, since it is larger than the sum of its proper divisors (2184094005).

3640156635 is a wasteful number, since it uses less digits than its factorization.

3640156635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242677117.

The product of its (nonzero) digits is 194400, while the sum is 39.

The square root of 3640156635 is about 60333.7106019512. The cubic root of 3640156635 is about 1538.2964006783.

The spelling of 3640156635 in words is "three billion, six hundred forty million, one hundred fifty-six thousand, six hundred thirty-five".