50563698397 has 4 divisors (see below), whose sum is σ = 50618127420. Its totient is φ = 50509269376.

The previous prime is 50563698371. The next prime is 50563698413. The reversal of 50563698397 is 79389636505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 607425316 + 49956273081 = 24646^2 + 223509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50563698397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50563698197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27213118 + ... + 27214975.

It is an arithmetic number, because the mean of its divisors is an integer number (12654531855).

Almost surely, 2^50563698397 is an apocalyptic number.

It is an amenable number.

50563698397 is a deficient number, since it is larger than the sum of its proper divisors (54429023).

50563698397 is an equidigital number, since it uses as much as digits as its factorization.

50563698397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54429022.

The product of its (nonzero) digits is 36741600, while the sum is 61.

The spelling of 50563698397 in words is "fifty billion, five hundred sixty-three million, six hundred ninety-eight thousand, three hundred ninety-seven".