2053939173581 has 2 divisors, whose sum is σ = 2053939173582. Its totient is φ = 2053939173580.

The previous prime is 2053939173571. The next prime is 2053939173593. The reversal of 2053939173581 is 1853719393502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2038984084900 + 14955088681 = 1427930^2 + 122291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2053939173581 is a prime.

It is a super-2 number, since 2×2053939173581² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2053939173541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1026969586790 + 1026969586791.

It is an arithmetic number, because the mean of its divisors is an integer number (1026969586791).

Almost surely, 2^{2053939173581} is an apocalyptic number.

It is an amenable number.

2053939173581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2053939173581 is an equidigital number, since it uses as much as digits as its factorization.

2053939173581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6123600, while the sum is 56.

The spelling of 2053939173581 in words is "two trillion, fifty-three billion, nine hundred thirty-nine million, one hundred seventy-three thousand, five hundred eighty-one".