12402663781564 has 24 divisors (see below), whose sum is σ = 25061052595040. Its totient is φ = 5260629113856.

The previous prime is 12402663781537. The next prime is 12402663781567. The reversal of 12402663781564 is 46518736620421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12402663781567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2283256449 + ... + 2283261880.

Almost surely, 2^{12402663781564} is an apocalyptic number.

12402663781564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12402663781564 is an abundant number, since it is smaller than the sum of its proper divisors (12658388813476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12402663781564 is a wasteful number, since it uses less digits than its factorization.

12402663781564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4566518437 (or 4566518435 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 12402663781564 in words is "twelve trillion, four hundred two billion, six hundred sixty-three million, seven hundred eighty-one thousand, five hundred sixty-four".