49924986721 has 3 divisors (see below), whose sum is σ = 49925210161. Its totient is φ = 49924763282.

The previous prime is 49924986719. The next prime is 49924986737. The reversal of 49924986721 is 12768942994.

The square root of 49924986721 is 223439.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 49924986721 - 2¹ = 49924986719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49924986721.

It is not an unprimeable number, because it can be changed into a prime (49924984721) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 111720 + ... + 335158.

Almost surely, 2^49924986721 is an apocalyptic number.

49924986721 is the 223439-th square number.

49924986721 is the 111720-th centered octagonal number.

It is an amenable number.

49924986721 is a deficient number, since it is larger than the sum of its proper divisors (223440).

49924986721 is an frugal number, since it uses more digits than its factorization.

49924986721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446878 (or 223439 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 61.

The spelling of 49924986721 in words is "forty-nine billion, nine hundred twenty-four million, nine hundred eighty-six thousand, seven hundred twenty-one".