12987723655 has 8 divisors (see below), whose sum is σ = 15947716752. Its totient is φ = 10148546688.

The previous prime is 12987723649. The next prime is 12987723659. The reversal of 12987723655 is 55632778921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12987723655 - 2³ = 12987723647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12987723596 and 12987723605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12987723659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30203794 + ... + 30204223.

It is an arithmetic number, because the mean of its divisors is an integer number (1993464594).

Almost surely, 2^12987723655 is an apocalyptic number.

12987723655 is a deficient number, since it is larger than the sum of its proper divisors (2959993097).

12987723655 is an equidigital number, since it uses as much as digits as its factorization.

12987723655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60408065.

The product of its digits is 6350400, while the sum is 55.

The spelling of 12987723655 in words is "twelve billion, nine hundred eighty-seven million, seven hundred twenty-three thousand, six hundred fifty-five".