12861935481 has 32 divisors (see below), whose sum is σ = 17763338880. Its totient is φ = 8274714624.

The previous prime is 12861935479. The next prime is 12861935483. The reversal of 12861935481 is 18453916821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12861935479) and next prime (12861935483).

It is not a de Polignac number, because 12861935481 - 2¹ = 12861935479 is a prime.

It is a super-2 number, since 2×12861935481² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12861935481.

It is not an unprimeable number, because it can be changed into a prime (12861935483) 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, 1887226 + ... + 1894028.

It is an arithmetic number, because the mean of its divisors is an integer number (555104340).

Almost surely, 2^12861935481 is an apocalyptic number.

It is an amenable number.

12861935481 is a deficient number, since it is larger than the sum of its proper divisors (4901403399).

12861935481 is an equidigital number, since it uses as much as digits as its factorization.

12861935481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7065.

The product of its digits is 414720, while the sum is 48.

The spelling of 12861935481 in words is "twelve billion, eight hundred sixty-one million, nine hundred thirty-five thousand, four hundred eighty-one".