6501696645555 has 32 divisors (see below), whose sum is σ = 11625384409920. Its totient is φ = 3447527765760.

The previous prime is 6501696645539. The next prime is 6501696645599. The reversal of 6501696645555 is 5555466961056.

It is a happy number.

6501696645555 is a `hidden beast` number, since 6 + 5 + 0 + 16 + 9 + 6 + 64 + 5 + 555 = 666.

It is not a de Polignac number, because 6501696645555 - 2⁴ = 6501696645539 is a prime.

It is a super-2 number, since 2×6501696645555² (a number of 26 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6501696645492 and 6501696645501.

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, 139169466 + ... + 139216175.

It is an arithmetic number, because the mean of its divisors is an integer number (363293262810).

Almost surely, 2^{6501696645555} is an apocalyptic number.

6501696645555 is a deficient number, since it is larger than the sum of its proper divisors (5123687764365).

6501696645555 is a wasteful number, since it uses less digits than its factorization.

6501696645555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278385828 (or 278385822 counting only the distinct ones).

The product of its (nonzero) digits is 145800000, while the sum is 63.

The spelling of 6501696645555 in words is "six trillion, five hundred one billion, six hundred ninety-six million, six hundred forty-five thousand, five hundred fifty-five".