1309925400872 has 32 divisors (see below), whose sum is σ = 2707015489920. Its totient is φ = 589282275840.

The previous prime is 1309925400857. The next prime is 1309925400893. The reversal of 1309925400872 is 2780045299031.

It is a self number, because there is not a number n which added to its sum of digits gives 1309925400872.

It is an unprimeable number.

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, 76720928 + ... + 76737999.

It is an arithmetic number, because the mean of its divisors is an integer number (84594234060).

Almost surely, 2^{1309925400872} is an apocalyptic number.

It is an amenable number.

1309925400872 is an abundant number, since it is smaller than the sum of its proper divisors (1397090089048).

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

1309925400872 is a wasteful number, since it uses less digits than its factorization.

1309925400872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153459041 (or 153459037 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 1309925400872 in words is "one trillion, three hundred nine billion, nine hundred twenty-five million, four hundred thousand, eight hundred seventy-two".