12537891894 has 32 divisors (see below), whose sum is σ = 27871547904. Its totient is φ = 3727674080.

The previous prime is 12537891869. The next prime is 12537891923. The reversal of 12537891894 is 49819873521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1788654 + ... + 1795649.

It is an arithmetic number, because the mean of its divisors is an integer number (870985872).

Almost surely, 2^12537891894 is an apocalyptic number.

12537891894 is an abundant number, since it is smaller than the sum of its proper divisors (15333656010).

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

12537891894 is a wasteful number, since it uses less digits than its factorization.

12537891894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3584372.

The product of its digits is 4354560, while the sum is 57.

The spelling of 12537891894 in words is "twelve billion, five hundred thirty-seven million, eight hundred ninety-one thousand, eight hundred ninety-four".