6561350005156 has 24 divisors (see below), whose sum is σ = 11493355135136. Its totient is φ = 3277535659200.

The previous prime is 6561350005121. The next prime is 6561350005169. The reversal of 6561350005156 is 6515000531656.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18722815 + ... + 19070041.

Almost surely, 2^{6561350005156} is an apocalyptic number.

It is an amenable number.

6561350005156 is a deficient number, since it is larger than the sum of its proper divisors (4932005129980).

6561350005156 is a wasteful number, since it uses less digits than its factorization.

6561350005156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351739 (or 351737 counting only the distinct ones).

The product of its (nonzero) digits is 405000, while the sum is 43.

The spelling of 6561350005156 in words is "six trillion, five hundred sixty-one billion, three hundred fifty million, five thousand, one hundred fifty-six".