2161516510650 has 72 divisors (see below), whose sum is σ = 6235754591520. Its totient is φ = 494060915040.

The previous prime is 2161516510597. The next prime is 2161516510667. The reversal of 2161516510650 is 560156151612.

It is a junction number, because it is equal to n+sod(n) for n = 2161516510599 and 2161516510608.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 147034590 + ... + 147049289.

It is an arithmetic number, because the mean of its divisors is an integer number (86607702660).

Almost surely, 2^{2161516510650} is an apocalyptic number.

2161516510650 is an abundant number, since it is smaller than the sum of its proper divisors (4074238080870).

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

2161516510650 is a wasteful number, since it uses less digits than its factorization.

2161516510650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294083908 (or 294083896 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 39.

The spelling of 2161516510650 in words is "two trillion, one hundred sixty-one billion, five hundred sixteen million, five hundred ten thousand, six hundred fifty".