16053251661 has 24 divisors (see below), whose sum is σ = 23592672896. Its totient is φ = 10516495680.

The previous prime is 16053251653. The next prime is 16053251689. The reversal of 16053251661 is 16615235061.

16053251661 is a `hidden beast` number, since 1 + 60 + 532 + 5 + 1 + 6 + 61 = 666.

It is not a de Polignac number, because 16053251661 - 2³ = 16053251653 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 (16053051661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132966 + ... + 223128.

Almost surely, 2^16053251661 is an apocalyptic number.

It is an amenable number.

16053251661 is a deficient number, since it is larger than the sum of its proper divisors (7539421235).

16053251661 is a wasteful number, since it uses less digits than its factorization.

16053251661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90513 (or 90510 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 16053251661 in words is "sixteen billion, fifty-three million, two hundred fifty-one thousand, six hundred sixty-one".