50121981599 has 2 divisors, whose sum is σ = 50121981600. Its totient is φ = 50121981598.

The previous prime is 50121981583. The next prime is 50121981629. The reversal of 50121981599 is 99518912105.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50121981599 - 2⁴ = 50121981583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50121981509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25060990799 + 25060990800.

It is an arithmetic number, because the mean of its divisors is an integer number (25060990800).

Almost surely, 2^50121981599 is an apocalyptic number.

50121981599 is a deficient number, since it is larger than the sum of its proper divisors (1).

50121981599 is an equidigital number, since it uses as much as digits as its factorization.

50121981599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 50.

The spelling of 50121981599 in words is "fifty billion, one hundred twenty-one million, nine hundred eighty-one thousand, five hundred ninety-nine".