697809823506432 has 2240 divisors, whose sum is σ = 2713007352760320. Its totient is φ = 174281900949504.

The previous prime is 697809823506409. The next prime is 697809823506473. The reversal of 697809823506432 is 234605328908796.

It is a happy number.

697809823506432 is a `hidden beast` number, since 6 + 9 + 7 + 8 + 0 + 9 + 82 + 3 + 506 + 4 + 32 = 666.

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

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 159 ways as a sum of consecutive naturals, for example, 278789380893 + ... + 278789383395.

It is an arithmetic number, because the mean of its divisors is an integer number (1211163996768).

Almost surely, 2^{697809823506432} 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 697809823506432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1356503676380160).

697809823506432 is an abundant number, since it is smaller than the sum of its proper divisors (2015197529253888).

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

697809823506432 is an frugal number, since it uses more digits than its factorization.

697809823506432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595 (or 2547 counting only the distinct ones).

The product of its (nonzero) digits is 940584960, while the sum is 72.

The spelling of 697809823506432 in words is "six hundred ninety-seven trillion, eight hundred nine billion, eight hundred twenty-three million, five hundred six thousand, four hundred thirty-two".