12629725840 has 40 divisors (see below), whose sum is σ = 29368979640. Its totient is φ = 5051053056.

The previous prime is 12629725831. The next prime is 12629725859. The reversal of 12629725840 is 4852792621.

It can be written as a sum of positive squares in 4 ways, for example, as 2244485376 + 10385240464 = 47376^2 + 101908^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 746596 + ... + 763324.

It is an arithmetic number, because the mean of its divisors is an integer number (734224491).

Almost surely, 2^12629725840 is an apocalyptic number.

12629725840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12629725840 is an abundant number, since it is smaller than the sum of its proper divisors (16739253800).

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

12629725840 is a wasteful number, since it uses less digits than its factorization.

12629725840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26179 (or 26173 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 12629725840 in words is "twelve billion, six hundred twenty-nine million, seven hundred twenty-five thousand, eight hundred forty".