12491894006 has 4 divisors (see below), whose sum is σ = 18737841012. Its totient is φ = 6245947002.

The previous prime is 12491893969. The next prime is 12491894017. The reversal of 12491894006 is 60049819421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60049819421 = 17341 ⋅3462881.

It is a super-3 number, since 3×12491894006³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3122973500 + ... + 3122973503.

It is an arithmetic number, because the mean of its divisors is an integer number (4684460253).

Almost surely, 2^12491894006 is an apocalyptic number.

12491894006 is a deficient number, since it is larger than the sum of its proper divisors (6245947006).

12491894006 is an equidigital number, since it uses as much as digits as its factorization.

12491894006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6245947005.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 12491894006 in words is "twelve billion, four hundred ninety-one million, eight hundred ninety-four thousand, six".