13195126381257 has 32 divisors (see below), whose sum is σ = 19831671541760. Its totient is φ = 8670059188560.

The previous prime is 13195126381223. The next prime is 13195126381303. The reversal of 13195126381257 is 75218362159131.

It is a happy number.

13195126381257 is a `hidden beast` number, since 1 + 3 + 1 + 9 + 5 + 1 + 2 + 6 + 381 + 257 = 666.

It is not a de Polignac number, because 13195126381257 - 2⁸ = 13195126381001 is a prime.

It is a super-2 number, since 2×13195126381257² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13195126381757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10656673 + ... + 11830254.

It is an arithmetic number, because the mean of its divisors is an integer number (619739735680).

Almost surely, 2^{13195126381257} is an apocalyptic number.

It is an amenable number.

13195126381257 is a deficient number, since it is larger than the sum of its proper divisors (6636545160503).

13195126381257 is a wasteful number, since it uses less digits than its factorization.

13195126381257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22487250 (or 22487244 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The spelling of 13195126381257 in words is "thirteen trillion, one hundred ninety-five billion, one hundred twenty-six million, three hundred eighty-one thousand, two hundred fifty-seven".