681324567 has 40 divisors (see below), whose sum is σ = 1156252800. Its totient is φ = 353893680.

The previous prime is 681324563. The next prime is 681324569. The reversal of 681324567 is 765423186.

It is not a de Polignac number, because 681324567 - 2² = 681324563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681324563) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 74934 + ... + 83532.

It is an arithmetic number, because the mean of its divisors is an integer number (28906320).

Almost surely, 2^681324567 is an apocalyptic number.

681324567 is a deficient number, since it is larger than the sum of its proper divisors (474928233).

681324567 is an equidigital number, since it uses as much as digits as its factorization.

681324567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8641 (or 8620 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 681324567 is about 26102.1946778427. The cubic root of 681324567 is about 879.9365342487.

The spelling of 681324567 in words is "six hundred eighty-one million, three hundred twenty-four thousand, five hundred sixty-seven".