12357727720 has 64 divisors (see below), whose sum is σ = 31705143120. Its totient is φ = 4294447104.

The previous prime is 12357727709. The next prime is 12357727727. The reversal of 12357727720 is 2772775321.

It can be written as a sum of positive squares in 8 ways, for example, as 5984260164 + 6373467556 = 77358^2 + 79834^2 .

It is not an unprimeable number, because it can be changed into a prime (12357727727) 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, 690127 + ... + 707806.

Almost surely, 2^12357727720 is an apocalyptic number.

12357727720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12357727720 is an abundant number, since it is smaller than the sum of its proper divisors (19347415400).

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

12357727720 is a wasteful number, since it uses less digits than its factorization.

12357727720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397974 (or 1397970 counting only the distinct ones).

The product of its (nonzero) digits is 288120, while the sum is 43.

The spelling of 12357727720 in words is "twelve billion, three hundred fifty-seven million, seven hundred twenty-seven thousand, seven hundred twenty".