12981051603 has 32 divisors (see below), whose sum is σ = 21192174080. Its totient is φ = 7802555040.

The previous prime is 12981051599. The next prime is 12981051661. The reversal of 12981051603 is 30615018921.

12981051603 is a `hidden beast` number, since 129 + 8 + 10 + 516 + 0 + 3 = 666.

It is not a de Polignac number, because 12981051603 - 2² = 12981051599 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12981056603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 414943 + ... + 445128.

It is an arithmetic number, because the mean of its divisors is an integer number (662255440).

Almost surely, 2^12981051603 is an apocalyptic number.

12981051603 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12981051603 is a deficient number, since it is larger than the sum of its proper divisors (8211122477).

12981051603 is a wasteful number, since it uses less digits than its factorization.

12981051603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860136 (or 860130 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 12981051603 in words is "twelve billion, nine hundred eighty-one million, fifty-one thousand, six hundred three".