12739461940 has 12 divisors (see below), whose sum is σ = 26752870116. Its totient is φ = 5095784768.

The previous prime is 12739461893. The next prime is 12739461953. The reversal of 12739461940 is 4916493721.

It can be written as a sum of positive squares in 2 ways, for example, as 7373313424 + 5366148516 = 85868^2 + 73254^2 .

It is a congruent number.

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, 318486529 + ... + 318486568.

It is an arithmetic number, because the mean of its divisors is an integer number (2229405843).

Almost surely, 2^12739461940 is an apocalyptic number.

12739461940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12739461940 is an abundant number, since it is smaller than the sum of its proper divisors (14013408176).

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

12739461940 is a wasteful number, since it uses less digits than its factorization.

12739461940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636973106 (or 636973104 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 12739461940 in words is "twelve billion, seven hundred thirty-nine million, four hundred sixty-one thousand, nine hundred forty".