49991643252 has 36 divisors (see below), whose sum is σ = 129449909316. Its totient is φ = 16257444480.

The previous prime is 49991643239. The next prime is 49991643253. The reversal of 49991643252 is 25234619994.

49991643252 is a `hidden beast` number, since 499 + 91 + 6 + 43 + 25 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28292585616 + 21699057636 = 168204^2 + 147306^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49991643253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16933363 + ... + 16936314.

Almost surely, 2^49991643252 is an apocalyptic number.

It is an amenable number.

49991643252 is an abundant number, since it is smaller than the sum of its proper divisors (79458266064).

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

49991643252 is a wasteful number, since it uses less digits than its factorization.

49991643252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33869728 (or 33869723 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The spelling of 49991643252 in words is "forty-nine billion, nine hundred ninety-one million, six hundred forty-three thousand, two hundred fifty-two".