2161435102644 has 144 divisors (see below), whose sum is σ = 5384920601088. Its totient is φ = 674630702592.

The previous prime is 2161435102633. The next prime is 2161435102747. The reversal of 2161435102644 is 4462015341612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 811652857 + ... + 811655519.

It is an arithmetic number, because the mean of its divisors is an integer number (37395281952).

Almost surely, 2^{2161435102644} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2161435102644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2692460300544).

2161435102644 is an abundant number, since it is smaller than the sum of its proper divisors (3223485498444).

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

2161435102644 is a wasteful number, since it uses less digits than its factorization.

2161435102644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814 (or 3795 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 2161435102644 in words is "two trillion, one hundred sixty-one billion, four hundred thirty-five million, one hundred two thousand, six hundred forty-four".