1691326260100 has 27 divisors (see below), whose sum is σ = 3670206205701. Its totient is φ = 676525302000.

The previous prime is 1691326260097. The next prime is 1691326260157. The reversal of 1691326260100 is 10626231961.

The square root of 1691326260100 is 1300510.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 608877453636 + 1082448806464 = 780306^2 + 1040408^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1691326260100.

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 8 ways as a sum of consecutive naturals, for example, 12940075 + ... + 13070125.

Almost surely, 2^{1691326260100} is an apocalyptic number.

1691326260100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1691326260100 is the 1300510-th square number.

It is an amenable number.

1691326260100 is an abundant number, since it is smaller than the sum of its proper divisors (1978879945601).

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

1691326260100 is an frugal number, since it uses more digits than its factorization.

1691326260100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260116 (or 130058 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 1691326260100 in words is "one trillion, six hundred ninety-one billion, three hundred twenty-six million, two hundred sixty thousand, one hundred".