12643243754 has 16 divisors (see below), whose sum is σ = 19198952640. Its totient is φ = 6243637440.

The previous prime is 12643243747. The next prime is 12643243783. The reversal of 12643243754 is 45734234621.

It is a super-2 number, since 2×12643243754² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 695027 + ... + 712985.

It is an arithmetic number, because the mean of its divisors is an integer number (1199934540).

Almost surely, 2^12643243754 is an apocalyptic number.

12643243754 is a deficient number, since it is larger than the sum of its proper divisors (6555708886).

12643243754 is a wasteful number, since it uses less digits than its factorization.

12643243754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22285.

The product of its digits is 483840, while the sum is 41.

The spelling of 12643243754 in words is "twelve billion, six hundred forty-three million, two hundred forty-three thousand, seven hundred fifty-four".