13649133977957 has 2 divisors, whose sum is σ = 13649133977958. Its totient is φ = 13649133977956.

The previous prime is 13649133977953. The next prime is 13649133978001. The reversal of 13649133977957 is 75977933194631.

It is a happy number.

13649133977957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7399128977956 + 6250005000001 = 2720134^2 + 2500001^2 .

It is a cyclic number.

It is not a de Polignac number, because 13649133977957 - 2² = 13649133977953 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13649133977953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6824566988978 + 6824566988979.

It is an arithmetic number, because the mean of its divisors is an integer number (6824566988979).

Almost surely, 2^{13649133977957} is an apocalyptic number.

It is an amenable number.

13649133977957 is a deficient number, since it is larger than the sum of its proper divisors (1).

13649133977957 is an equidigital number, since it uses as much as digits as its factorization.

13649133977957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810152280, while the sum is 74.

The spelling of 13649133977957 in words is "thirteen trillion, six hundred forty-nine billion, one hundred thirty-three million, nine hundred seventy-seven thousand, nine hundred fifty-seven".