50662123381 has 2 divisors, whose sum is σ = 50662123382. Its totient is φ = 50662123380.

The previous prime is 50662123373. The next prime is 50662123397. The reversal of 50662123381 is 18332126605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30630250225 + 20031873156 = 175015^2 + 141534^2 .

It is a cyclic number.

It is not a de Polignac number, because 50662123381 - 2³ = 50662123373 is a prime.

It is a super-2 number, since 2×50662123381² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 50662123381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50662123361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25331061690 + 25331061691.

It is an arithmetic number, because the mean of its divisors is an integer number (25331061691).

Almost surely, 2^50662123381 is an apocalyptic number.

It is an amenable number.

50662123381 is a deficient number, since it is larger than the sum of its proper divisors (1).

50662123381 is an equidigital number, since it uses as much as digits as its factorization.

50662123381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 50662123381 its reverse (18332126605), we get a palindrome (68994249986).

The spelling of 50662123381 in words is "fifty billion, six hundred sixty-two million, one hundred twenty-three thousand, three hundred eighty-one".