2581421186069 has 24 divisors (see below), whose sum is σ = 2990715863520. Its totient is φ = 2220295160160.

The previous prime is 2581421186023. The next prime is 2581421186093. The reversal of 2581421186069 is 9606811241852.

It is not a de Polignac number, because 2581421186069 - 2²⁰ = 2581420137493 is a prime.

It is a super-2 number, since 2×2581421186069² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2581421186069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581421183069) 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 23 ways as a sum of consecutive naturals, for example, 998702 + ... + 2481984.

It is an arithmetic number, because the mean of its divisors is an integer number (124613160980).

Almost surely, 2^{2581421186069} is an apocalyptic number.

It is an amenable number.

2581421186069 is a deficient number, since it is larger than the sum of its proper divisors (409294677451).

2581421186069 is a wasteful number, since it uses less digits than its factorization.

2581421186069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484081 (or 1484070 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 2581421186069 in words is "two trillion, five hundred eighty-one billion, four hundred twenty-one million, one hundred eighty-six thousand, sixty-nine".