6645544708902 has 64 divisors (see below), whose sum is σ = 15132993384960. Its totient is φ = 1925835436800.

The previous prime is 6645544708889. The next prime is 6645544708927. The reversal of 6645544708902 is 2098074455466.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6715752 + ... + 7641492.

It is an arithmetic number, because the mean of its divisors is an integer number (236453021640).

Almost surely, 2^{6645544708902} is an apocalyptic number.

6645544708902 is an abundant number, since it is smaller than the sum of its proper divisors (8487448676058).

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

6645544708902 is a wasteful number, since it uses less digits than its factorization.

6645544708902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930509.

The product of its (nonzero) digits is 58060800, while the sum is 60.

The spelling of 6645544708902 in words is "six trillion, six hundred forty-five billion, five hundred forty-four million, seven hundred eight thousand, nine hundred two".