12781897622 has 32 divisors (see below), whose sum is σ = 20845188000. Its totient is φ = 5843109888.

The previous prime is 12781897561. The next prime is 12781897631. The reversal of 12781897622 is 22679818721.

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, 1618748 + ... + 1626624.

It is an arithmetic number, because the mean of its divisors is an integer number (651412125).

Almost surely, 2^12781897622 is an apocalyptic number.

12781897622 is a deficient number, since it is larger than the sum of its proper divisors (8063290378).

12781897622 is a wasteful number, since it uses less digits than its factorization.

12781897622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8480.

The product of its digits is 1354752, while the sum is 53.

The spelling of 12781897622 in words is "twelve billion, seven hundred eighty-one million, eight hundred ninety-seven thousand, six hundred twenty-two".