687699295896 has 128 divisors (see below), whose sum is σ = 1898510400000. Its totient is φ = 206726123520.

The previous prime is 687699295873. The next prime is 687699295897. The reversal of 687699295896 is 698592996786.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687699295897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 572680 + ... + 1305128.

It is an arithmetic number, because the mean of its divisors is an integer number (14832112500).

Almost surely, 2^687699295896 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 687699295896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (949255200000).

687699295896 is an abundant number, since it is smaller than the sum of its proper divisors (1210811104104).

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

687699295896 is a wasteful number, since it uses less digits than its factorization.

687699295896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732577 (or 732573 counting only the distinct ones).

The product of its digits is 6348948480, while the sum is 84.

The spelling of 687699295896 in words is "six hundred eighty-seven billion, six hundred ninety-nine million, two hundred ninety-five thousand, eight hundred ninety-six".