50104972721 has 2 divisors, whose sum is σ = 50104972722. Its totient is φ = 50104972720.

The previous prime is 50104972681. The next prime is 50104972811. The reversal of 50104972721 is 12727940105.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45214068496 + 4890904225 = 212636^2 + 69935^2 .

It is a cyclic number.

It is not a de Polignac number, because 50104972721 - 2²² = 50100778417 is a prime.

It is not a weakly prime, because it can be changed into another prime (50104932721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25052486360 + 25052486361.

It is an arithmetic number, because the mean of its divisors is an integer number (25052486361).

Almost surely, 2^50104972721 is an apocalyptic number.

It is an amenable number.

50104972721 is a deficient number, since it is larger than the sum of its proper divisors (1).

50104972721 is an equidigital number, since it uses as much as digits as its factorization.

50104972721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 38.

The spelling of 50104972721 in words is "fifty billion, one hundred four million, nine hundred seventy-two thousand, seven hundred twenty-one".