2051661432 has 16 divisors (see below), whose sum is σ = 5129153640. Its totient is φ = 683887136.

The previous prime is 2051661431. The next prime is 2051661497. The reversal of 2051661432 is 2341661502.

It is a self number, because there is not a number n which added to its sum of digits gives 2051661432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051661431) 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, 42742923 + ... + 42742970.

Almost surely, 2^2051661432 is an apocalyptic number.

It is an amenable number.

2051661432 is an abundant number, since it is smaller than the sum of its proper divisors (3077492208).

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

2051661432 is a wasteful number, since it uses less digits than its factorization.

2051661432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85485902 (or 85485898 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 2051661432 is about 45295.2694218723. The cubic root of 2051661432 is about 1270.6771828203.

The spelling of 2051661432 in words is "two billion, fifty-one million, six hundred sixty-one thousand, four hundred thirty-two".