6497393540 has 96 divisors (see below), whose sum is σ = 16269216768. Its totient is φ = 2151936000.

The previous prime is 6497393527. The next prime is 6497393563. The reversal of 6497393540 is 453937946.

It is a super-2 number, since 2×6497393540² = 84432245627267463200, which contains 22 as substring.

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, 87920 + ... + 143960.

It is an arithmetic number, because the mean of its divisors is an integer number (169471008).

Almost surely, 2^6497393540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6497393540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8134608384).

6497393540 is an abundant number, since it is smaller than the sum of its proper divisors (9771823228).

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

6497393540 is a wasteful number, since it uses less digits than its factorization.

6497393540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56109 (or 56107 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 50.

The square root of 6497393540 is about 80606.4112834705. The cubic root of 6497393540 is about 1866.0060927241.

The spelling of 6497393540 in words is "six billion, four hundred ninety-seven million, three hundred ninety-three thousand, five hundred forty".