12571640740 has 24 divisors (see below), whose sum is σ = 26461717632. Its totient is φ = 5016985440.

The previous prime is 12571640729. The next prime is 12571640779. The reversal of 12571640740 is 4704617521.

It is a self number, because there is not a number n which added to its sum of digits gives 12571640740.

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, 720594 + ... + 737833.

It is an arithmetic number, because the mean of its divisors is an integer number (1102571568).

Almost surely, 2^12571640740 is an apocalyptic number.

12571640740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12571640740 is an abundant number, since it is smaller than the sum of its proper divisors (13890076892).

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

12571640740 is a wasteful number, since it uses less digits than its factorization.

12571640740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458867 (or 1458865 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The spelling of 12571640740 in words is "twelve billion, five hundred seventy-one million, six hundred forty thousand, seven hundred forty".