691384320000 has 1440 divisors, whose sum is σ = 2831843894880. Its totient is φ = 162201600000.

The previous prime is 691384319959. The next prime is 691384320043. The reversal of 691384320000 is 23483196.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 22302719985 + ... + 22302720015.

Almost surely, 2^691384320000 is an apocalyptic number.

691384320000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691384320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1415921947440).

691384320000 is an abundant number, since it is smaller than the sum of its proper divisors (2140459574880).

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

691384320000 is an equidigital number, since it uses as much as digits as its factorization.

691384320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 691384320000 in words is "six hundred ninety-one billion, three hundred eighty-four million, three hundred twenty thousand".