13601855081 has 2 divisors, whose sum is σ = 13601855082. Its totient is φ = 13601855080.

The previous prime is 13601855077. The next prime is 13601855093. The reversal of 13601855081 is 18055810631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13595560000 + 6295081 = 116600^2 + 2509^2 .

It is a cyclic number.

It is not a de Polignac number, because 13601855081 - 2² = 13601855077 is a prime.

It is a super-2 number, since 2×13601855081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13601852081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6800927540 + 6800927541.

It is an arithmetic number, because the mean of its divisors is an integer number (6800927541).

Almost surely, 2^13601855081 is an apocalyptic number.

It is an amenable number.

13601855081 is a deficient number, since it is larger than the sum of its proper divisors (1).

13601855081 is an equidigital number, since it uses as much as digits as its factorization.

13601855081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 38.

The spelling of 13601855081 in words is "thirteen billion, six hundred one million, eight hundred fifty-five thousand, eighty-one".