6516507646 has 16 divisors (see below), whose sum is σ = 10666500480. Its totient is φ = 2961181080.

The previous prime is 6516507601. The next prime is 6516507649. The reversal of 6516507646 is 6467056156.

It is a super-2 number, since 2×6516507646² = 84929743800752922632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6516507596 and 6516507605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6516507649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36685 + ... + 119911.

It is an arithmetic number, because the mean of its divisors is an integer number (666656280).

Almost surely, 2^6516507646 is an apocalyptic number.

6516507646 is a deficient number, since it is larger than the sum of its proper divisors (4149992834).

6516507646 is a wasteful number, since it uses less digits than its factorization.

6516507646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86799.

The product of its (nonzero) digits is 907200, while the sum is 46.

The square root of 6516507646 is about 80724.8886403691. Note that the first 3 decimals coincide. The cubic root of 6516507646 is about 1867.8341139581.

The spelling of 6516507646 in words is "six billion, five hundred sixteen million, five hundred seven thousand, six hundred forty-six".