1306111026556 has 48 divisors (see below), whose sum is σ = 2642510304000. Its totient is φ = 553294844928.

The previous prime is 1306111026487. The next prime is 1306111026581. The reversal of 1306111026556 is 6556201116031.

It is a super-2 number, since 2×1306111026556² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 859735 + ... + 1830673.

It is an arithmetic number, because the mean of its divisors is an integer number (55052298000).

Almost surely, 2^{1306111026556} is an apocalyptic number.

It is an amenable number.

1306111026556 is an abundant number, since it is smaller than the sum of its proper divisors (1336399277444).

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

1306111026556 is a wasteful number, since it uses less digits than its factorization.

1306111026556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971506 (or 971504 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 1306111026556 in words is "one trillion, three hundred six billion, one hundred eleven million, twenty-six thousand, five hundred fifty-six".