13586992981 has 2 divisors, whose sum is σ = 13586992982. Its totient is φ = 13586992980.

The previous prime is 13586992949. The next prime is 13586992997. The reversal of 13586992981 is 18929968531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11537982225 + 2049010756 = 107415^2 + 45266^2 .

It is a cyclic number.

It is not a de Polignac number, because 13586992981 - 2⁵ = 13586992949 is a prime.

It is a super-2 number, since 2×13586992981² (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 (13586992901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6793496490 + 6793496491.

It is an arithmetic number, because the mean of its divisors is an integer number (6793496491).

Almost surely, 2^13586992981 is an apocalyptic number.

It is an amenable number.

13586992981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13586992981 is an equidigital number, since it uses as much as digits as its factorization.

13586992981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8398080, while the sum is 61.

The spelling of 13586992981 in words is "thirteen billion, five hundred eighty-six million, nine hundred ninety-two thousand, nine hundred eighty-one".