689915805040 has 160 divisors (see below), whose sum is σ = 2105115978240. Its totient is φ = 203720832000.

The previous prime is 689915805023. The next prime is 689915805071. The reversal of 689915805040 is 40508519986.

It is a Harshad number since it is a multiple of its sum of digits (55).

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 31 ways as a sum of consecutive naturals, for example, 2830311 + ... + 3064390.

It is an arithmetic number, because the mean of its divisors is an integer number (13156974864).

Almost surely, 2^689915805040 is an apocalyptic number.

It is an amenable number.

689915805040 is an abundant number, since it is smaller than the sum of its proper divisors (1415200173200).

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

689915805040 is a wasteful number, since it uses less digits than its factorization.

689915805040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5894751 (or 5894745 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 55.

The spelling of 689915805040 in words is "six hundred eighty-nine billion, nine hundred fifteen million, eight hundred five thousand, forty".