6402565135261 has 16 divisors (see below), whose sum is σ = 6633330986880. Its totient is φ = 6175014091200.

The previous prime is 6402565135223. The next prime is 6402565135297. The reversal of 6402565135261 is 1625315652046.

It is a cyclic number.

It is not a de Polignac number, because 6402565135261 - 2²³ = 6402556746653 is a prime.

It is a super-2 number, since 2×6402565135261² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402565135661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1382175 + ... + 3836083.

It is an arithmetic number, because the mean of its divisors is an integer number (414583186680).

Almost surely, 2^{6402565135261} is an apocalyptic number.

It is an amenable number.

6402565135261 is a deficient number, since it is larger than the sum of its proper divisors (230765851619).

6402565135261 is a wasteful number, since it uses less digits than its factorization.

6402565135261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454564.

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 6402565135261 in words is "six trillion, four hundred two billion, five hundred sixty-five million, one hundred thirty-five thousand, two hundred sixty-one".