13057626581821 has 16 divisors (see below), whose sum is σ = 13435740057600. Its totient is φ = 12685747409280.

The previous prime is 13057626581809. The next prime is 13057626581921. The reversal of 13057626581821 is 12818562675031.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13057626581821 - 2⁷ = 13057626581693 is a prime.

It is a super-2 number, since 2×13057626581821² (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 (13057626581921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2262781 + ... + 5588866.

It is an arithmetic number, because the mean of its divisors is an integer number (839733753600).

Almost surely, 2^{13057626581821} is an apocalyptic number.

It is an amenable number.

13057626581821 is a deficient number, since it is larger than the sum of its proper divisors (378113475779).

13057626581821 is a wasteful number, since it uses less digits than its factorization.

13057626581821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7852044.

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 13057626581821 in words is "thirteen trillion, fifty-seven billion, six hundred twenty-six million, five hundred eighty-one thousand, eight hundred twenty-one".