697940400137680 has 80 divisors (see below), whose sum is σ = 1855171509995520. Its totient is φ = 239210733920256.

The previous prime is 697940400137677. The next prime is 697940400137681. The reversal of 697940400137680 is 86731004049796.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697940400137681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214838289 + ... + 218062768.

It is an arithmetic number, because the mean of its divisors is an integer number (23189643874944).

Almost surely, 2^{697940400137680} is an apocalyptic number.

It is an amenable number.

697940400137680 is an abundant number, since it is smaller than the sum of its proper divisors (1157231109857840).

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

697940400137680 is a wasteful number, since it uses less digits than its factorization.

697940400137680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432903956 (or 432903950 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 64.

The spelling of 697940400137680 in words is "six hundred ninety-seven trillion, nine hundred forty billion, four hundred million, one hundred thirty-seven thousand, six hundred eighty".