689095591020 has 72 divisors (see below), whose sum is σ = 2092018232304. Its totient is φ = 183603957888.

The previous prime is 689095590979. The next prime is 689095591021. The reversal of 689095591020 is 20195590986.

689095591020 is a `hidden beast` number, since 6 + 89 + 0 + 9 + 559 + 1 + 0 + 2 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (689095591021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1398939 + ... + 1826258.

It is an arithmetic number, because the mean of its divisors is an integer number (29055808782).

Almost surely, 2^689095591020 is an apocalyptic number.

689095591020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

689095591020 is an abundant number, since it is smaller than the sum of its proper divisors (1402922641284).

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

689095591020 is a wasteful number, since it uses less digits than its factorization.

689095591020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3226399 (or 3226394 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The spelling of 689095591020 in words is "six hundred eighty-nine billion, ninety-five million, five hundred ninety-one thousand, twenty".