12345661752 has 32 divisors (see below), whose sum is σ = 30975594000. Its totient is φ = 4100361984.

The previous prime is 12345661747. The next prime is 12345661753. The reversal of 12345661752 is 25716654321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12345661753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 921877 + ... + 935172.

Almost surely, 2^12345661752 is an apocalyptic number.

12345661752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12345661752 is an abundant number, since it is smaller than the sum of its proper divisors (18629932248).

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

12345661752 is a wasteful number, since it uses less digits than its factorization.

12345661752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857335 (or 1857331 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The spelling of 12345661752 in words is "twelve billion, three hundred forty-five million, six hundred sixty-one thousand, seven hundred fifty-two".