6521416456 has 32 divisors (see below), whose sum is σ = 12569817600. Its totient is φ = 3170724480.

The previous prime is 6521416453. The next prime is 6521416471. The reversal of 6521416456 is 6546141256.

It is not an unprimeable number, because it can be changed into a prime (6521416453) 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, 37176 + ... + 120103.

It is an arithmetic number, because the mean of its divisors is an integer number (392806800).

Almost surely, 2^6521416456 is an apocalyptic number.

It is an amenable number.

6521416456 is a deficient number, since it is larger than the sum of its proper divisors (6048401144).

6521416456 is a wasteful number, since it uses less digits than its factorization.

6521416456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157429 (or 157425 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The square root of 6521416456 is about 80755.2874801397. The cubic root of 6521416456 is about 1868.3030022020.

The spelling of 6521416456 in words is "six billion, five hundred twenty-one million, four hundred sixteen thousand, four hundred fifty-six".