12987998774 has 8 divisors (see below), whose sum is σ = 19522003728. Its totient is φ = 6480664200.

The previous prime is 12987998711. The next prime is 12987998797. The reversal of 12987998774 is 47789978921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12987998774² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12987998698 and 12987998707.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6666377 + ... + 6668324.

It is an arithmetic number, because the mean of its divisors is an integer number (2440250466).

Almost surely, 2^12987998774 is an apocalyptic number.

12987998774 is a deficient number, since it is larger than the sum of its proper divisors (6534004954).

12987998774 is a wasteful number, since it uses less digits than its factorization.

12987998774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13335190.

The product of its digits is 128024064, while the sum is 71.

The spelling of 12987998774 in words is "twelve billion, nine hundred eighty-seven million, nine hundred ninety-eight thousand, seven hundred seventy-four".