13377137581 has 2 divisors, whose sum is σ = 13377137582. Its totient is φ = 13377137580.

The previous prime is 13377137569. The next prime is 13377137629. The reversal of 13377137581 is 18573177331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10248525225 + 3128612356 = 101235^2 + 55934^2 .

It is a cyclic number.

It is not a de Polignac number, because 13377137581 - 2¹¹ = 13377135533 is a prime.

It is a super-2 number, since 2×13377137581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13377137681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6688568790 + 6688568791.

It is an arithmetic number, because the mean of its divisors is an integer number (6688568791).

Almost surely, 2^13377137581 is an apocalyptic number.

It is an amenable number.

13377137581 is a deficient number, since it is larger than the sum of its proper divisors (1).

13377137581 is an equidigital number, since it uses as much as digits as its factorization.

13377137581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 370440, while the sum is 46.

The spelling of 13377137581 in words is "thirteen billion, three hundred seventy-seven million, one hundred thirty-seven thousand, five hundred eighty-one".