1310439905556 has 48 divisors (see below), whose sum is σ = 3164562562560. Its totient is φ = 421765908480.

The previous prime is 1310439905519. The next prime is 1310439905581. The reversal of 1310439905556 is 6555099340131.

It is a junction number, because it is equal to n+sod(n) for n = 1310439905499 and 1310439905508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13681636 + ... + 13777083.

It is an arithmetic number, because the mean of its divisors is an integer number (65928386720).

Almost surely, 2^{1310439905556} is an apocalyptic number.

It is an amenable number.

1310439905556 is an abundant number, since it is smaller than the sum of its proper divisors (1854122657004).

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

1310439905556 is a wasteful number, since it uses less digits than its factorization.

1310439905556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27458864 (or 27458862 counting only the distinct ones).

The product of its (nonzero) digits is 2187000, while the sum is 51.

The spelling of 1310439905556 in words is "one trillion, three hundred ten billion, four hundred thirty-nine million, nine hundred five thousand, five hundred fifty-six".