12127747572 has 48 divisors (see below), whose sum is σ = 33291861120. Its totient is φ = 3804782976.

The previous prime is 12127747531. The next prime is 12127747573. The reversal of 12127747572 is 27574772121.

12127747572 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 7 + 74 + 7 + 572 = 666.

It is a super-2 number, since 2×12127747572² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12127747573) 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, 3300928 + ... + 3304599.

It is an arithmetic number, because the mean of its divisors is an integer number (693580440).

Almost surely, 2^12127747572 is an apocalyptic number.

12127747572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12127747572 is an abundant number, since it is smaller than the sum of its proper divisors (21164113548).

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

12127747572 is a wasteful number, since it uses less digits than its factorization.

12127747572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6605557 (or 6605549 counting only the distinct ones).

The product of its digits is 384160, while the sum is 45.

The spelling of 12127747572 in words is "twelve billion, one hundred twenty-seven million, seven hundred forty-seven thousand, five hundred seventy-two".