12671993740 has 24 divisors (see below), whose sum is σ = 30412785312. Its totient is φ = 4344683520.

The previous prime is 12671993651. The next prime is 12671993743. The reversal of 12671993740 is 4739917621.

It is not an unprimeable number, because it can be changed into a prime (12671993743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45256981 + ... + 45257260.

It is an arithmetic number, because the mean of its divisors is an integer number (1267199388).

Almost surely, 2^12671993740 is an apocalyptic number.

12671993740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12671993740 is an abundant number, since it is smaller than the sum of its proper divisors (17740791572).

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

12671993740 is a wasteful number, since it uses less digits than its factorization.

12671993740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90514257 (or 90514255 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 49.

The spelling of 12671993740 in words is "twelve billion, six hundred seventy-one million, nine hundred ninety-three thousand, seven hundred forty".