6645632142 has 16 divisors (see below), whose sum is σ = 13380469200. Its totient is φ = 2200343232.

The previous prime is 6645632107. The next prime is 6645632171. The reversal of 6645632142 is 2412365466.

It is a self number, because there is not a number n which added to its sum of digits gives 6645632142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3715903 + ... + 3717690.

It is an arithmetic number, because the mean of its divisors is an integer number (836279325).

Almost surely, 2^6645632142 is an apocalyptic number.

6645632142 is an abundant number, since it is smaller than the sum of its proper divisors (6734837058).

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

6645632142 is a wasteful number, since it uses less digits than its factorization.

6645632142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7433747.

The product of its digits is 207360, while the sum is 39.

The square root of 6645632142 is about 81520.7466967765. The cubic root of 6645632142 is about 1880.0905477363.

The spelling of 6645632142 in words is "six billion, six hundred forty-five million, six hundred thirty-two thousand, one hundred forty-two".