2150522065661 has 4 divisors (see below), whose sum is σ = 2160165662592. Its totient is φ = 2140878468732.

The previous prime is 2150522065633. The next prime is 2150522065669. The reversal of 2150522065661 is 1665602250512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2150522065661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2150522065669) 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, 4821798131 + ... + 4821798576.

It is an arithmetic number, because the mean of its divisors is an integer number (540041415648).

Almost surely, 2^{2150522065661} is an apocalyptic number.

It is an amenable number.

2150522065661 is a deficient number, since it is larger than the sum of its proper divisors (9643596931).

2150522065661 is an equidigital number, since it uses as much as digits as its factorization.

2150522065661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9643596930.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 2150522065661 in words is "two trillion, one hundred fifty billion, five hundred twenty-two million, sixty-five thousand, six hundred sixty-one".