646834260465 has 48 divisors (see below), whose sum is σ = 1187262925056. Its totient is φ = 324649382400.

The previous prime is 646834260461. The next prime is 646834260481. The reversal of 646834260465 is 564062438646.

646834260465 is a `hidden beast` number, since 6 + 4 + 6 + 83 + 42 + 60 + 465 = 666.

646834260465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 646834260465 - 2² = 646834260461 is a prime.

It is a super-2 number, since 2×646834260465² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (646834260461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7677720 + ... + 7761510.

It is an arithmetic number, because the mean of its divisors is an integer number (24734644272).

Almost surely, 2^646834260465 is an apocalyptic number.

It is an amenable number.

646834260465 is a deficient number, since it is larger than the sum of its proper divisors (540428664591).

646834260465 is a wasteful number, since it uses less digits than its factorization.

646834260465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93910 (or 93907 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 54.

The spelling of 646834260465 in words is "six hundred forty-six billion, eight hundred thirty-four million, two hundred sixty thousand, four hundred sixty-five".