50378265517 has 2 divisors, whose sum is σ = 50378265518. Its totient is φ = 50378265516.

The previous prime is 50378265481. The next prime is 50378265547. The reversal of 50378265517 is 71556287305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47434226436 + 2944039081 = 217794^2 + 54259^2 .

It is a cyclic number.

It is not a de Polignac number, because 50378265517 - 2³¹ = 48230781869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50378265547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25189132758 + 25189132759.

It is an arithmetic number, because the mean of its divisors is an integer number (25189132759).

Almost surely, 2^50378265517 is an apocalyptic number.

It is an amenable number.

50378265517 is a deficient number, since it is larger than the sum of its proper divisors (1).

50378265517 is an equidigital number, since it uses as much as digits as its factorization.

50378265517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764000, while the sum is 49.

The spelling of 50378265517 in words is "fifty billion, three hundred seventy-eight million, two hundred sixty-five thousand, five hundred seventeen".