50749726729 has 45 divisors (see below), whose sum is σ = 58161313809. Its totient is φ = 44280447120.

The previous prime is 50749726717. The next prime is 50749726747. The reversal of 50749726729 is 92762794705.

The square root of 50749726729 is 225277.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25162525129 + 25587201600 = 158627^2 + 159960^2 .

It is a de Polignac number, because none of the positive numbers 2^k-50749726729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50749726789) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1180226182 + ... + 1180226224.

Almost surely, 2^50749726729 is an apocalyptic number.

50749726729 is the 225277-th square number.

50749726729 is the 112639-th centered octagonal number.

It is an amenable number.

50749726729 is a deficient number, since it is larger than the sum of its proper divisors (7411587080).

50749726729 is an frugal number, since it uses more digits than its factorization.

50749726729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 13335840, while the sum is 58.

The spelling of 50749726729 in words is "fifty billion, seven hundred forty-nine million, seven hundred twenty-six thousand, seven hundred twenty-nine".