50561216507 has 4 divisors (see below), whose sum is σ = 50757953016. Its totient is φ = 50364480000.

The previous prime is 50561216423. The next prime is 50561216513. The reversal of 50561216507 is 70561216505.

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

It is a cyclic number.

It is not a de Polignac number, because 50561216507 - 2¹² = 50561212411 is a prime.

It is a super-2 number, since 2×50561216507² (a number of 22 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50561216557) 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, 98367869 + ... + 98368382.

It is an arithmetic number, because the mean of its divisors is an integer number (12689488254).

Almost surely, 2^50561216507 is an apocalyptic number.

50561216507 is a deficient number, since it is larger than the sum of its proper divisors (196736509).

50561216507 is a wasteful number, since it uses less digits than its factorization.

50561216507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196736508.

The product of its (nonzero) digits is 63000, while the sum is 38.

The spelling of 50561216507 in words is "fifty billion, five hundred sixty-one million, two hundred sixteen thousand, five hundred seven".