6321965640 has 64 divisors (see below), whose sum is σ = 19287374400. Its totient is φ = 1657281792.

The previous prime is 6321965597. The next prime is 6321965717. The reversal of 6321965640 is 465691236.

It is a junction number, because it is equal to n+sod(n) for n = 6321965592 and 6321965601.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439387 + ... + 453546.

It is an arithmetic number, because the mean of its divisors is an integer number (301365225).

Almost surely, 2^6321965640 is an apocalyptic number.

6321965640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6321965640 is an abundant number, since it is smaller than the sum of its proper divisors (12965408760).

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

6321965640 is a wasteful number, since it uses less digits than its factorization.

6321965640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893006 (or 893002 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 6321965640 is about 79510.7894565260. The cubic root of 6321965640 is about 1849.0587507973.

The spelling of 6321965640 in words is "six billion, three hundred twenty-one million, nine hundred sixty-five thousand, six hundred forty".