501338734381 has 2 divisors, whose sum is σ = 501338734382. Its totient is φ = 501338734380.

The previous prime is 501338734367. The next prime is 501338734387. The reversal of 501338734381 is 183437833105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 501215857156 + 122877225 = 707966^2 + 11085^2 .

It is a cyclic number.

It is not a de Polignac number, because 501338734381 - 2²³ = 501330345773 is a prime.

It is a super-2 number, since 2×501338734381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (501338734387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250669367190 + 250669367191.

It is an arithmetic number, because the mean of its divisors is an integer number (250669367191).

Almost surely, 2^501338734381 is an apocalyptic number.

It is an amenable number.

501338734381 is a deficient number, since it is larger than the sum of its proper divisors (1).

501338734381 is an equidigital number, since it uses as much as digits as its factorization.

501338734381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 501338734381 in words is "five hundred one billion, three hundred thirty-eight million, seven hundred thirty-four thousand, three hundred eighty-one".