6451640332 has 12 divisors (see below), whose sum is σ = 11406766840. Its totient is φ = 3192564096.

The previous prime is 6451640303. The next prime is 6451640341. The reversal of 6451640332 is 2330461546.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8313582 + ... + 8314357.

Almost surely, 2^6451640332 is an apocalyptic number.

It is an amenable number.

6451640332 is a deficient number, since it is larger than the sum of its proper divisors (4955126508).

6451640332 is a wasteful number, since it uses less digits than its factorization.

6451640332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16628040 (or 16628038 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 6451640332 is about 80322.1036328108. The cubic root of 6451640332 is about 1861.6157706087.

The spelling of 6451640332 in words is "six billion, four hundred fifty-one million, six hundred forty thousand, three hundred thirty-two".