12625673781 has 32 divisors (see below), whose sum is σ = 20379893760. Its totient is φ = 6787259136.

The previous prime is 12625673777. The next prime is 12625673791. The reversal of 12625673781 is 18737652621.

It is not a de Polignac number, because 12625673781 - 2² = 12625673777 is a prime.

It is a super-2 number, since 2×12625673781² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 12625673781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12625673741) 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, 964180 + ... + 977186.

It is an arithmetic number, because the mean of its divisors is an integer number (636871680).

Almost surely, 2^12625673781 is an apocalyptic number.

It is an amenable number.

12625673781 is a deficient number, since it is larger than the sum of its proper divisors (7754219979).

12625673781 is a wasteful number, since it uses less digits than its factorization.

12625673781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15753.

The product of its digits is 846720, while the sum is 48.

The spelling of 12625673781 in words is "twelve billion, six hundred twenty-five million, six hundred seventy-three thousand, seven hundred eighty-one".