7644745902 has 32 divisors (see below), whose sum is σ = 15450559488. Its totient is φ = 2521444896.

The previous prime is 7644745891. The next prime is 7644745903. The reversal of 7644745902 is 2095474467.

It is a super-2 number, since 2×7644745902² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7644745903) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 875068 + ... + 883760.

It is an arithmetic number, because the mean of its divisors is an integer number (482829984).

Almost surely, 2^7644745902 is an apocalyptic number.

7644745902 is an abundant number, since it is smaller than the sum of its proper divisors (7805813586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7644745902 is a wasteful number, since it uses less digits than its factorization.

7644745902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10224.

The product of its (nonzero) digits is 1693440, while the sum is 48.

The square root of 7644745902 is about 87434.2375845984. The cubic root of 7644745902 is about 1969.9461366224.

The spelling of 7644745902 in words is "seven billion, six hundred forty-four million, seven hundred forty-five thousand, nine hundred two".