49749948721 has 6 divisors (see below), whose sum is σ = 54683828066. Its totient is φ = 45227226000.

The previous prime is 49749948697. The next prime is 49749948739. The reversal of 49749948721 is 12784994794.

It can be written as a sum of positive squares in only one way, i.e., 41412250000 + 8337698721 = 203500^2 + 91311^2 .

It is not a de Polignac number, because 49749948721 - 2³¹ = 47602465073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49749978721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 205578180 + ... + 205578421.

Almost surely, 2^49749948721 is an apocalyptic number.

It is an amenable number.

49749948721 is a deficient number, since it is larger than the sum of its proper divisors (4933879345).

49749948721 is a wasteful number, since it uses less digits than its factorization.

49749948721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411156623 (or 411156612 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 64.

The spelling of 49749948721 in words is "forty-nine billion, seven hundred forty-nine million, nine hundred forty-eight thousand, seven hundred twenty-one".