681524774 has 16 divisors (see below), whose sum is σ = 1190373408. Its totient is φ = 286570752.

The previous prime is 681524773. The next prime is 681524791. The reversal of 681524774 is 477425186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681524771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458507 + ... + 459990.

It is an arithmetic number, because the mean of its divisors is an integer number (74398338).

Almost surely, 2^681524774 is an apocalyptic number.

681524774 is a deficient number, since it is larger than the sum of its proper divisors (508848634).

681524774 is a wasteful number, since it uses less digits than its factorization.

681524774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918559.

The product of its digits is 376320, while the sum is 44.

The square root of 681524774 is about 26106.0294568132. The cubic root of 681524774 is about 880.0227154949.

The spelling of 681524774 in words is "six hundred eighty-one million, five hundred twenty-four thousand, seven hundred seventy-four".