3640249456 has 40 divisors (see below), whose sum is σ = 7252169760. Its totient is φ = 1769354496.

The previous prime is 3640249439. The next prime is 3640249471. The reversal of 3640249456 is 6549420463.

It is a happy number.

It is a super-2 number, since 2×3640249456² = 26502832203816591872, which contains 22 as substring.

Together with 3611920304 it forms an amicable pair .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72741 + ... + 112123.

It is an arithmetic number, because the mean of its divisors is an integer number (181304244).

Almost surely, 2^3640249456 is an apocalyptic number.

It is an amenable number.

3640249456 is a deficient number, since it is larger than the sum of its proper divisors (3611920304).

3640249456 is a wasteful number, since it uses less digits than its factorization.

3640249456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39553 (or 39547 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The square root of 3640249456 is about 60334.4798270442. The cubic root of 3640249456 is about 1538.3094756648.

It can be divided in two parts, 36402 and 49456, that added together give a palindrome (85858).

The spelling of 3640249456 in words is "three billion, six hundred forty million, two hundred forty-nine thousand, four hundred fifty-six".