12340731646 has 4 divisors (see below), whose sum is σ = 18511097472. Its totient is φ = 6170365822.

The previous prime is 12340731617. The next prime is 12340731671. The reversal of 12340731646 is 64613704321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64613704321 = 37 ⋅1746316333.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3085182910 + ... + 3085182913.

It is an arithmetic number, because the mean of its divisors is an integer number (4627774368).

Almost surely, 2^12340731646 is an apocalyptic number.

12340731646 is a deficient number, since it is larger than the sum of its proper divisors (6170365826).

12340731646 is an equidigital number, since it uses as much as digits as its factorization.

12340731646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6170365825.

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 12340731646 in words is "twelve billion, three hundred forty million, seven hundred thirty-one thousand, six hundred forty-six".