690841625906560 has 256 divisors, whose sum is σ = 1753364604625920. Its totient is φ = 259757569843200.

The previous prime is 690841625906557. The next prime is 690841625906609. The reversal of 690841625906560 is 65609526148096.

It is a Sastry number since concatenated with its successor gives a square.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 196877830 + ... + 200356090.

It is an arithmetic number, because the mean of its divisors is an integer number (6849080486820).

Almost surely, 2^{690841625906560} 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 690841625906560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (876682302312960).

690841625906560 is an abundant number, since it is smaller than the sum of its proper divisors (1062522978719360).

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

690841625906560 is a wasteful number, since it uses less digits than its factorization.

690841625906560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478537 (or 3478525 counting only the distinct ones).

The product of its (nonzero) digits is 167961600, while the sum is 67.

The spelling of 690841625906560 in words is "six hundred ninety trillion, eight hundred forty-one billion, six hundred twenty-five million, nine hundred six thousand, five hundred sixty".