690697331632 has 80 divisors (see below), whose sum is σ = 1669733915904. Its totient is φ = 268893792000.

The previous prime is 690697331591. The next prime is 690697331633. The reversal of 690697331632 is 236133796096.

It is not an unprimeable number, because it can be changed into a prime (690697331633) 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, 1373382 + ... + 1807642.

Almost surely, 2^690697331632 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 690697331632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (834866957952).

690697331632 is an abundant number, since it is smaller than the sum of its proper divisors (979036584272).

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

690697331632 is a wasteful number, since it uses less digits than its factorization.

690697331632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435578 (or 435572 counting only the distinct ones).

The product of its (nonzero) digits is 6613488, while the sum is 55.

The spelling of 690697331632 in words is "six hundred ninety billion, six hundred ninety-seven million, three hundred thirty-one thousand, six hundred thirty-two".