50766621513 has 4 divisors (see below), whose sum is σ = 67688828688. Its totient is φ = 33844414340.

The previous prime is 50766621509. The next prime is 50766621533. The reversal of 50766621513 is 31512666705.

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 not a de Polignac number, because 50766621513 - 2² = 50766621509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50766621533) 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, 8461103583 + ... + 8461103588.

It is an arithmetic number, because the mean of its divisors is an integer number (16922207172).

Almost surely, 2^50766621513 is an apocalyptic number.

It is an amenable number.

50766621513 is a deficient number, since it is larger than the sum of its proper divisors (16922207175).

50766621513 is a wasteful number, since it uses less digits than its factorization.

50766621513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16922207174.

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 50766621513 in words is "fifty billion, seven hundred sixty-six million, six hundred twenty-one thousand, five hundred thirteen".