691090201300 has 144 divisors (see below), whose sum is σ = 1560940093440. Its totient is φ = 265296240000.

The previous prime is 691090201237. The next prime is 691090201369. The reversal of 691090201300 is 3102090196.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 443289921 + ... + 443291479.

It is an arithmetic number, because the mean of its divisors is an integer number (10839861760).

Almost surely, 2^691090201300 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691090201300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780470046720).

691090201300 is an abundant number, since it is smaller than the sum of its proper divisors (869849892140).

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

691090201300 is a wasteful number, since it uses less digits than its factorization.

691090201300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702 (or 2695 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

Adding to 691090201300 its reverse (3102090196), we get a palindrome (694192291496).

The spelling of 691090201300 in words is "six hundred ninety-one billion, ninety million, two hundred one thousand, three hundred".