2163797861601 has 32 divisors (see below), whose sum is σ = 3219711949440. Its totient is φ = 1284556022784.

The previous prime is 2163797861597. The next prime is 2163797861657. The reversal of 2163797861601 is 1061687973612.

It is a happy number.

It is not a de Polignac number, because 2163797861601 - 2² = 2163797861597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (2163797862601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 695350 + ... + 2193423.

It is an arithmetic number, because the mean of its divisors is an integer number (100615998420).

Almost surely, 2^{2163797861601} is an apocalyptic number.

It is an amenable number.

2163797861601 is a deficient number, since it is larger than the sum of its proper divisors (1055914087839).

2163797861601 is a wasteful number, since it uses less digits than its factorization.

2163797861601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2889585.

The product of its (nonzero) digits is 4572288, while the sum is 57.

The spelling of 2163797861601 in words is "two trillion, one hundred sixty-three billion, seven hundred ninety-seven million, eight hundred sixty-one thousand, six hundred one".