689847279264 has 1152 divisors, whose sum is σ = 2574350553600. Its totient is φ = 177975705600.

The previous prime is 689847279221. The next prime is 689847279281. The reversal of 689847279264 is 462972748986.

689847279264 is a `hidden beast` number, since 6 + 8 + 9 + 8 + 472 + 7 + 92 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 689847279192 and 689847279201.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 906500644 + ... + 906501404.

It is an arithmetic number, because the mean of its divisors is an integer number (2234679300).

Almost surely, 2^689847279264 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 689847279264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1287175276800).

689847279264 is an abundant number, since it is smaller than the sum of its proper divisors (1884503274336).

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

689847279264 is a wasteful number, since it uses less digits than its factorization.

689847279264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867 (or 842 counting only the distinct ones).

The product of its digits is 585252864, while the sum is 72.

The spelling of 689847279264 in words is "six hundred eighty-nine billion, eight hundred forty-seven million, two hundred seventy-nine thousand, two hundred sixty-four".