50261499917 has 4 divisors (see below), whose sum is σ = 51882838656. Its totient is φ = 48640161180.

The previous prime is 50261499791. The next prime is 50261499943. The reversal of 50261499917 is 71999416205.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50261499917 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 (50261499517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810669323 + ... + 810669384.

It is an arithmetic number, because the mean of its divisors is an integer number (12970709664).

Almost surely, 2^50261499917 is an apocalyptic number.

It is an amenable number.

50261499917 is a deficient number, since it is larger than the sum of its proper divisors (1621338739).

50261499917 is a wasteful number, since it uses less digits than its factorization.

50261499917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621338738.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The spelling of 50261499917 in words is "fifty billion, two hundred sixty-one million, four hundred ninety-nine thousand, nine hundred seventeen".