696988393920 has 2688 divisors, whose sum is σ = 3323500185600. Its totient is φ = 134154289152.

The previous prime is 696988393909. The next prime is 696988393951. The reversal of 696988393920 is 29393889696.

696988393920 is a `hidden beast` number, since 69 + 6 + 98 + 8 + 393 + 92 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 7185447312 + ... + 7185447408.

It is an arithmetic number, because the mean of its divisors is an integer number (1236421200).

Almost surely, 2^696988393920 is an apocalyptic number.

696988393920 is a gapful number since it is divisible by the number (60) 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 696988393920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1661750092800).

696988393920 is an abundant number, since it is smaller than the sum of its proper divisors (2626511791680).

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

696988393920 is a wasteful number, since it uses less digits than its factorization.

696988393920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 272097792, while the sum is 72.

The spelling of 696988393920 in words is "six hundred ninety-six billion, nine hundred eighty-eight million, three hundred ninety-three thousand, nine hundred twenty".