3634431813 has 12 divisors (see below), whose sum is σ = 5260520928. Its totient is φ = 2417976360.

The previous prime is 3634431809. The next prime is 3634431833. The reversal of 3634431813 is 3181344363.

3634431813 is a `hidden beast` number, since 3 + 634 + 4 + 3 + 1 + 8 + 13 = 666.

It is not a de Polignac number, because 3634431813 - 2² = 3634431809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3634431803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 410223 + ... + 418988.

It is an arithmetic number, because the mean of its divisors is an integer number (438376744).

Almost surely, 2^3634431813 is an apocalyptic number.

It is an amenable number.

3634431813 is a deficient number, since it is larger than the sum of its proper divisors (1626089115).

3634431813 is a wasteful number, since it uses less digits than its factorization.

3634431813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829704 (or 829701 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 3634431813 is about 60286.2489544672. The cubic root of 3634431813 is about 1537.4895586838.

The spelling of 3634431813 in words is "three billion, six hundred thirty-four million, four hundred thirty-one thousand, eight hundred thirteen".