690691250000 has 80 divisors (see below), whose sum is σ = 1672766616144. Its totient is φ = 276276000000.

The previous prime is 690691249999. The next prime is 690691250101. The reversal of 690691250000 is 52196096.

It can be written as a sum of positive squares in 8 ways, for example, as 467325366544 + 223365883456 = 683612^2 + 472616^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 973724 + ... + 1526276.

Almost surely, 2^690691250000 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 690691250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (836383308072).

690691250000 is an abundant number, since it is smaller than the sum of its proper divisors (982075366144).

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

690691250000 is an frugal number, since it uses more digits than its factorization.

690691250000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552596 (or 552560 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 38.

The spelling of 690691250000 in words is "six hundred ninety billion, six hundred ninety-one million, two hundred fifty thousand".