12265971558 has 32 divisors (see below), whose sum is σ = 25138747872. Its totient is φ = 3987590400.

The previous prime is 12265971551. The next prime is 12265971581. The reversal of 12265971558 is 85517956221.

It is a self number, because there is not a number n which added to its sum of digits gives 12265971558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12265971551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 941368 + ... + 954308.

It is an arithmetic number, because the mean of its divisors is an integer number (785585871).

Almost surely, 2^12265971558 is an apocalyptic number.

12265971558 is an abundant number, since it is smaller than the sum of its proper divisors (12872776314).

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

12265971558 is a wasteful number, since it uses less digits than its factorization.

12265971558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16840.

The product of its digits is 1512000, while the sum is 51.

The spelling of 12265971558 in words is "twelve billion, two hundred sixty-five million, nine hundred seventy-one thousand, five hundred fifty-eight".