49557537721 has 8 divisors (see below), whose sum is σ = 52211174400. Its totient is φ = 46908435600.

The previous prime is 49557537703. The next prime is 49557537727. The reversal of 49557537721 is 12773575594.

49557537721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49557537721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49557537727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1111186 + ... + 1154923.

It is an arithmetic number, because the mean of its divisors is an integer number (6526396800).

Almost surely, 2^49557537721 is an apocalyptic number.

It is an amenable number.

49557537721 is a deficient number, since it is larger than the sum of its proper divisors (2653636679).

49557537721 is a wasteful number, since it uses less digits than its factorization.

49557537721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267279.

The product of its digits is 9261000, while the sum is 55.

The spelling of 49557537721 in words is "forty-nine billion, five hundred fifty-seven million, five hundred thirty-seven thousand, seven hundred twenty-one".