689574124836 has 27 divisors (see below), whose sum is σ = 1743102743473. Its totient is φ = 229856380800.

The previous prime is 689574124831. The next prime is 689574124843. The reversal of 689574124836 is 638421475986.

The square root of 689574124836 is 830406.

It is a perfect power (a square), and thus also a powerful number.

689574124836 is a `hidden beast` number, since 6 + 8 + 9 + 574 + 1 + 24 + 8 + 36 = 666.

It can be written as a sum of positive squares in only one way, i.e., 310019558436 + 379554566400 = 556794^2 + 616080^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689574124831) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4913236 + ... + 5051636.

Almost surely, 2^689574124836 is an apocalyptic number.

689574124836 is the 830406-th square number.

It is an amenable number.

689574124836 is an abundant number, since it is smaller than the sum of its proper divisors (1053528618637).

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

689574124836 is an frugal number, since it uses more digits than its factorization.

689574124836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276812 (or 138406 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 63.

The spelling of 689574124836 in words is "six hundred eighty-nine billion, five hundred seventy-four million, one hundred twenty-four thousand, eight hundred thirty-six".