6459973940 has 48 divisors (see below), whose sum is σ = 15882096384. Its totient is φ = 2160825600.

The previous prime is 6459973931. The next prime is 6459973957. The reversal of 6459973940 is 493799546.

It is a congruent number.

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, 556976 + ... + 568455.

It is an arithmetic number, because the mean of its divisors is an integer number (330877008).

Almost surely, 2^6459973940 is an apocalyptic number.

It is an amenable number.

6459973940 is an abundant number, since it is smaller than the sum of its proper divisors (9422122444).

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

6459973940 is a wasteful number, since it uses less digits than its factorization.

6459973940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125488 (or 1125486 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 56.

The square root of 6459973940 is about 80373.9630726269. The cubic root of 6459973940 is about 1862.4169777566.

The spelling of 6459973940 in words is "six billion, four hundred fifty-nine million, nine hundred seventy-three thousand, nine hundred forty".