690824786608 has 80 divisors (see below), whose sum is σ = 1506535718400. Its totient is φ = 304186371840.

The previous prime is 690824786569. The next prime is 690824786609. The reversal of 690824786608 is 806687428096.

It is a super-2 number, since 2×690824786608² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 690824786608.

It is not an unprimeable number, because it can be changed into a prime (690824786609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268183 + ... + 1205641.

It is an arithmetic number, because the mean of its divisors is an integer number (18831696480).

Almost surely, 2^690824786608 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 690824786608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753267859200).

690824786608 is an abundant number, since it is smaller than the sum of its proper divisors (815710931792).

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

690824786608 is a wasteful number, since it uses less digits than its factorization.

690824786608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937610 (or 937604 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 64.

The spelling of 690824786608 in words is "six hundred ninety billion, eight hundred twenty-four million, seven hundred eighty-six thousand, six hundred eight".