689981698808400 has 240 divisors, whose sum is σ = 2284034853038400. Its totient is φ = 177936794112000.

The previous prime is 689981698808371. The next prime is 689981698808411. The reversal of 689981698808400 is 4808896189986.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×689981698808400² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60985125 + ... + 71408324.

It is an arithmetic number, because the mean of its divisors is an integer number (9516811887660).

Almost surely, 2^{689981698808400} is an apocalyptic number.

689981698808400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

689981698808400 is an abundant number, since it is smaller than the sum of its proper divisors (1594053154230000).

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

689981698808400 is a wasteful number, since it uses less digits than its factorization.

689981698808400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132393614 (or 132393603 counting only the distinct ones).

The product of its (nonzero) digits is 3439853568, while the sum is 84.

The spelling of 689981698808400 in words is "six hundred eighty-nine trillion, nine hundred eighty-one billion, six hundred ninety-eight million, eight hundred eight thousand, four hundred".