2161651641424 has 20 divisors (see below), whose sum is σ = 4568945515200. Its totient is φ = 982568927840.

The previous prime is 2161651641421. The next prime is 2161651641427. The reversal of 2161651641424 is 4241461561612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2161651641421) and next prime (2161651641427).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161651641421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6141055624 + ... + 6141055975.

It is an arithmetic number, because the mean of its divisors is an integer number (228447275760).

Almost surely, 2^{2161651641424} is an apocalyptic number.

It is an amenable number.

2161651641424 is an abundant number, since it is smaller than the sum of its proper divisors (2407293873776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2161651641424 is a wasteful number, since it uses less digits than its factorization.

2161651641424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12282111618 (or 12282111612 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

The spelling of 2161651641424 in words is "two trillion, one hundred sixty-one billion, six hundred fifty-one million, six hundred forty-one thousand, four hundred twenty-four".