12356971605 has 192 divisors, whose sum is σ = 25738352640. Its totient is φ = 5628268800.

The previous prime is 12356971589. The next prime is 12356971607. The reversal of 12356971605 is 50617965321.

12356971605 is a `hidden beast` number, since 1 + 2 + 35 + 6 + 9 + 7 + 1 + 605 = 666.

It is not a de Polignac number, because 12356971605 - 2⁴ = 12356971589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12356971607) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 18750766 + ... + 18751424.

It is an arithmetic number, because the mean of its divisors is an integer number (134053920).

Almost surely, 2^12356971605 is an apocalyptic number.

12356971605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12356971605 is an abundant number, since it is smaller than the sum of its proper divisors (13381381035).

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

12356971605 is a wasteful number, since it uses less digits than its factorization.

12356971605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774 (or 762 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 12356971605 in words is "twelve billion, three hundred fifty-six million, nine hundred seventy-one thousand, six hundred five".