6401055645165 has 32 divisors (see below), whose sum is σ = 10784839766400. Its totient is φ = 3232983248640.

The previous prime is 6401055645139. The next prime is 6401055645169. The reversal of 6401055645165 is 5615465501046.

It is not a de Polignac number, because 6401055645165 - 2¹⁹ = 6401055120877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401055645169) 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, 3537610 + ... + 5031579.

It is an arithmetic number, because the mean of its divisors is an integer number (337026242700).

Almost surely, 2^{6401055645165} is an apocalyptic number.

It is an amenable number.

6401055645165 is a deficient number, since it is larger than the sum of its proper divisors (4383784121235).

6401055645165 is a wasteful number, since it uses less digits than its factorization.

6401055645165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8571837.

The product of its (nonzero) digits is 2160000, while the sum is 48.

The spelling of 6401055645165 in words is "six trillion, four hundred one billion, fifty-five million, six hundred forty-five thousand, one hundred sixty-five".