689724145548 has 60 divisors (see below), whose sum is σ = 1812417680920. Its totient is φ = 228716794368.

The previous prime is 689724145547. The next prime is 689724145609. The reversal of 689724145548 is 845541427986.

It is a happy number.

689724145548 is a `hidden beast` number, since 6 + 8 + 9 + 7 + 2 + 41 + 45 + 548 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (689724145547) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 5452438 + ... + 5577501.

Almost surely, 2^689724145548 is an apocalyptic number.

It is an amenable number.

689724145548 is an abundant number, since it is smaller than the sum of its proper divisors (1122693535372).

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

689724145548 is a wasteful number, since it uses less digits than its factorization.

689724145548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11030148 (or 11030137 counting only the distinct ones).

The product of its digits is 77414400, while the sum is 63.

The spelling of 689724145548 in words is "six hundred eighty-nine billion, seven hundred twenty-four million, one hundred forty-five thousand, five hundred forty-eight".