689601627440 has 80 divisors (see below), whose sum is σ = 1753696327680. Its totient is φ = 250102460160.

The previous prime is 689601627439. The next prime is 689601627457. The reversal of 689601627440 is 44726106986.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 700304 + ... + 1367343.

It is an arithmetic number, because the mean of its divisors is an integer number (21921204096).

Almost surely, 2^689601627440 is an apocalyptic number.

It is an amenable number.

689601627440 is an abundant number, since it is smaller than the sum of its proper divisors (1064094700240).

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

689601627440 is a wasteful number, since it uses less digits than its factorization.

689601627440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068050 (or 2068044 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 689601627440 in words is "six hundred eighty-nine billion, six hundred one million, six hundred twenty-seven thousand, four hundred forty".