50997391871 has 2 divisors, whose sum is σ = 50997391872. Its totient is φ = 50997391870.

The previous prime is 50997391859. The next prime is 50997391897. The reversal of 50997391871 is 17819379905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50997391871 - 2¹⁸ = 50997129727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50997391871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50997391831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25498695935 + 25498695936.

It is an arithmetic number, because the mean of its divisors is an integer number (25498695936).

Almost surely, 2^50997391871 is an apocalyptic number.

50997391871 is a deficient number, since it is larger than the sum of its proper divisors (1).

50997391871 is an equidigital number, since it uses as much as digits as its factorization.

50997391871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4286520, while the sum is 59.

The spelling of 50997391871 in words is "fifty billion, nine hundred ninety-seven million, three hundred ninety-one thousand, eight hundred seventy-one".