12505740894 has 12 divisors (see below), whose sum is σ = 27095771976. Its totient is φ = 4168580292.

The previous prime is 12505740893. The next prime is 12505740899. The reversal of 12505740894 is 49804750521.

12505740894 is a `hidden beast` number, since 12 + 505 + 7 + 40 + 8 + 94 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12505740893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 347381674 + ... + 347381709.

It is an arithmetic number, because the mean of its divisors is an integer number (2257980998).

Almost surely, 2^12505740894 is an apocalyptic number.

12505740894 is an abundant number, since it is smaller than the sum of its proper divisors (14590031082).

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

12505740894 is a wasteful number, since it uses less digits than its factorization.

12505740894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694763391 (or 694763388 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 12505740894 in words is "twelve billion, five hundred five million, seven hundred forty thousand, eight hundred ninety-four".