1316556426690 has 192 divisors, whose sum is σ = 3672243993600. Its totient is φ = 326291628672.

The previous prime is 1316556426623. The next prime is 1316556426751. The reversal of 1316556426690 is 966246556131.

1316556426690 is a `hidden beast` number, since 1 + 3 + 1 + 6 + 556 + 4 + 26 + 69 + 0 = 666.

It is a super-2 number, since 2×1316556426690² (a number of 25 digits) contains 22 as substring.

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 95 ways as a sum of consecutive naturals, for example, 18810981 + ... + 18880839.

It is an arithmetic number, because the mean of its divisors is an integer number (19126270800).

Almost surely, 2^{1316556426690} is an apocalyptic number.

1316556426690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1316556426690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1836121996800).

1316556426690 is an abundant number, since it is smaller than the sum of its proper divisors (2355687566910).

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

1316556426690 is a wasteful number, since it uses less digits than its factorization.

1316556426690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70101 (or 70098 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 1316556426690 in words is "one trillion, three hundred sixteen billion, five hundred fifty-six million, four hundred twenty-six thousand, six hundred ninety".