49533398721 has 21 divisors (see below), whose sum is σ = 74275135249. Its totient is φ = 33018259716.

The previous prime is 49533398671. The next prime is 49533398741. The reversal of 49533398721 is 12789333594.

The square root of 49533398721 is 222561.

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

49533398721 is a `hidden beast` number, since 4 + 9 + 533 + 3 + 9 + 87 + 21 = 666.

49533398721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 49533398721 - 2⁹ = 49533398209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49533398741) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 6005026 + ... + 6013268.

Almost surely, 2^49533398721 is an apocalyptic number.

49533398721 is the 222561-st square number.

49533398721 is the 111281-st centered octagonal number.

It is an amenable number.

49533398721 is a deficient number, since it is larger than the sum of its proper divisors (24741736528).

49533398721 is an frugal number, since it uses more digits than its factorization.

49533398721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16504 (or 8246 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The spelling of 49533398721 in words is "forty-nine billion, five hundred thirty-three million, three hundred ninety-eight thousand, seven hundred twenty-one".