50658563381 has 4 divisors (see below), whose sum is σ = 53638478892. Its totient is φ = 47678647872.

The previous prime is 50658563369. The next prime is 50658563383. The reversal of 50658563381 is 18336585605.

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 41783039281 + 8875524100 = 204409^2 + 94210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50658563381 is a prime.

It is a super-2 number, since 2×50658563381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50658563383) 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, 1489957730 + ... + 1489957763.

It is an arithmetic number, because the mean of its divisors is an integer number (13409619723).

Almost surely, 2^50658563381 is an apocalyptic number.

It is an amenable number.

50658563381 is a deficient number, since it is larger than the sum of its proper divisors (2979915511).

50658563381 is a wasteful number, since it uses less digits than its factorization.

50658563381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2979915510.

The product of its (nonzero) digits is 2592000, while the sum is 50.

The spelling of 50658563381 in words is "fifty billion, six hundred fifty-eight million, five hundred sixty-three thousand, three hundred eighty-one".