12786689376 has 72 divisors (see below), whose sum is σ = 37304207640. Its totient is φ = 4261121856.

The previous prime is 12786689371. The next prime is 12786689389. The reversal of 12786689376 is 67398668721.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

12786689376 is a `hidden beast` number, since 127 + 8 + 66 + 89 + 376 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×12786689376² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12786689371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3321885 + ... + 3325731.

It is an arithmetic number, because the mean of its divisors is an integer number (518113995).

Almost surely, 2^12786689376 is an apocalyptic number.

12786689376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12786689376 is an abundant number, since it is smaller than the sum of its proper divisors (24517518264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12786689376 is an frugal number, since it uses more digits than its factorization.

12786689376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7713 (or 3852 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 63.

The spelling of 12786689376 in words is "twelve billion, seven hundred eighty-six million, six hundred eighty-nine thousand, three hundred seventy-six".