681288572 has 6 divisors (see below), whose sum is σ = 1192255008. Its totient is φ = 340644284.

The previous prime is 681288571. The next prime is 681288593. The reversal of 681288572 is 275882186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681288571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85161068 + ... + 85161075.

It is an arithmetic number, because the mean of its divisors is an integer number (198709168).

Almost surely, 2^681288572 is an apocalyptic number.

It is an amenable number.

681288572 is a deficient number, since it is larger than the sum of its proper divisors (510966436).

681288572 is a wasteful number, since it uses less digits than its factorization.

681288572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170322147 (or 170322145 counting only the distinct ones).

The product of its digits is 430080, while the sum is 47.

The square root of 681288572 is about 26101.5051673270. The cubic root of 681288572 is about 879.9210380252.

The spelling of 681288572 in words is "six hundred eighty-one million, two hundred eighty-eight thousand, five hundred seventy-two".