50778576020639 has 2 divisors, whose sum is σ = 50778576020640. Its totient is φ = 50778576020638.

The previous prime is 50778576020633. The next prime is 50778576020801. The reversal of 50778576020639 is 93602067587705.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50778576020639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50778576020633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25389288010319 + 25389288010320.

It is an arithmetic number, because the mean of its divisors is an integer number (25389288010320).

Almost surely, 2^{50778576020639} is an apocalyptic number.

50778576020639 is a deficient number, since it is larger than the sum of its proper divisors (1).

50778576020639 is an equidigital number, since it uses as much as digits as its factorization.

50778576020639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 133358400, while the sum is 65.

The spelling of 50778576020639 in words is "fifty trillion, seven hundred seventy-eight billion, five hundred seventy-six million, twenty thousand, six hundred thirty-nine".