681548552 has 8 divisors (see below), whose sum is σ = 1277903550. Its totient is φ = 340774272.

The previous prime is 681548519. The next prime is 681548557. The reversal of 681548552 is 255845186.

It can be written as a sum of positive squares in only one way, i.e., 680479396 + 1069156 = 26086^2 + 1034^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (681548557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42596777 + ... + 42596792.

Almost surely, 2^681548552 is an apocalyptic number.

It is an amenable number.

681548552 is a deficient number, since it is larger than the sum of its proper divisors (596354998).

681548552 is a wasteful number, since it uses less digits than its factorization.

681548552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85193575 (or 85193571 counting only the distinct ones).

The product of its digits is 384000, while the sum is 44.

The square root of 681548552 is about 26106.4848648760. The cubic root of 681548552 is about 880.0329498682.

The spelling of 681548552 in words is "six hundred eighty-one million, five hundred forty-eight thousand, five hundred fifty-two".