697640681472 has 528 divisors, whose sum is σ = 2264520966912. Its totient is φ = 190253629440.

The previous prime is 697640681471. The next prime is 697640681497. The reversal of 697640681472 is 274186046796.

It is not an unprimeable number, because it can be changed into a prime (697640681471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9556721628 + ... + 9556721700.

Almost surely, 2^697640681472 is an apocalyptic number.

697640681472 is a gapful number since it is divisible by the number (62) 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 697640681472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1132260483456).

697640681472 is an abundant number, since it is smaller than the sum of its proper divisors (1566880285440).

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

697640681472 is an frugal number, since it uses more digits than its factorization.

697640681472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 60.

The spelling of 697640681472 in words is "six hundred ninety-seven billion, six hundred forty million, six hundred eighty-one thousand, four hundred seventy-two".