6400770921217 has 32 divisors (see below), whose sum is σ = 6805624872960. Its totient is φ = 6007759243200.

The previous prime is 6400770921161. The next prime is 6400770921283. The reversal of 6400770921217 is 7121290770046.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6400770921217 is a prime.

It is a super-2 number, since 2×6400770921217² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6400770921817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135911448 + ... + 135958534.

It is an arithmetic number, because the mean of its divisors is an integer number (212675777280).

Almost surely, 2^{6400770921217} is an apocalyptic number.

It is an amenable number.

6400770921217 is a deficient number, since it is larger than the sum of its proper divisors (404853951743).

6400770921217 is a wasteful number, since it uses less digits than its factorization.

6400770921217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47733.

The product of its (nonzero) digits is 296352, while the sum is 46.

The spelling of 6400770921217 in words is "six trillion, four hundred billion, seven hundred seventy million, nine hundred twenty-one thousand, two hundred seventeen".