13395507727781 has 4 divisors (see below), whose sum is σ = 13395772140864. Its totient is φ = 13395243314700.

The previous prime is 13395507727739. The next prime is 13395507727829. The reversal of 13395507727781 is 18772770559331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13395507727781 is a prime.

It is a super-2 number, since 2×13395507727781² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13395507727081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132130535 + ... + 132231876.

It is an arithmetic number, because the mean of its divisors is an integer number (3348943035216).

Almost surely, 2^{13395507727781} is an apocalyptic number.

It is an amenable number.

13395507727781 is a deficient number, since it is larger than the sum of its proper divisors (264413083).

13395507727781 is an equidigital number, since it uses as much as digits as its factorization.

13395507727781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264413082.

The product of its (nonzero) digits is 77792400, while the sum is 65.

The spelling of 13395507727781 in words is "thirteen trillion, three hundred ninety-five billion, five hundred seven million, seven hundred twenty-seven thousand, seven hundred eighty-one".