12358643720 has 16 divisors (see below), whose sum is σ = 27806948460. Its totient is φ = 4943457472.

The previous prime is 12358643711. The next prime is 12358643753. The reversal of 12358643720 is 2734685321.

It can be written as a sum of positive squares in 2 ways, for example, as 11108738404 + 1249905316 = 105398^2 + 35354^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154483007 + ... + 154483086.

Almost surely, 2^12358643720 is an apocalyptic number.

12358643720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12358643720 is an abundant number, since it is smaller than the sum of its proper divisors (15448304740).

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

12358643720 is a wasteful number, since it uses less digits than its factorization.

12358643720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308966104 (or 308966100 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 12358643720 in words is "twelve billion, three hundred fifty-eight million, six hundred forty-three thousand, seven hundred twenty".