50990837697 has 12 divisors (see below), whose sum is σ = 77985987300. Its totient is φ = 31994251008.

The previous prime is 50990837687. The next prime is 50990837747. The reversal of 50990837697 is 79673809905.

50990837697 is a `hidden beast` number, since 509 + 9 + 0 + 8 + 37 + 6 + 97 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 32495109696 + 18495728001 = 180264^2 + 135999^2 .

It is not a de Polignac number, because 50990837697 - 2¹² = 50990833601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50990837617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166636572 + ... + 166636877.

It is an arithmetic number, because the mean of its divisors is an integer number (6498832275).

Almost surely, 2^50990837697 is an apocalyptic number.

It is an amenable number.

50990837697 is a deficient number, since it is larger than the sum of its proper divisors (26995149603).

50990837697 is a wasteful number, since it uses less digits than its factorization.

50990837697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333273472 (or 333273469 counting only the distinct ones).

The product of its (nonzero) digits is 25719120, while the sum is 63.

The spelling of 50990837697 in words is "fifty billion, nine hundred ninety million, eight hundred thirty-seven thousand, six hundred ninety-seven".