681732552 has 16 divisors (see below), whose sum is σ = 1704331440. Its totient is φ = 227244176.

The previous prime is 681732547. The next prime is 681732553. The reversal of 681732552 is 255237186.

It is a self number, because there is not a number n which added to its sum of digits gives 681732552.

It is not an unprimeable number, because it can be changed into a prime (681732553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14202738 + ... + 14202785.

It is an arithmetic number, because the mean of its divisors is an integer number (106520715).

Almost surely, 2^681732552 is an apocalyptic number.

It is an amenable number.

681732552 is an abundant number, since it is smaller than the sum of its proper divisors (1022598888).

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

681732552 is a wasteful number, since it uses less digits than its factorization.

681732552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28405532 (or 28405528 counting only the distinct ones).

The product of its digits is 100800, while the sum is 39.

The square root of 681732552 is about 26110.0086556860. The cubic root of 681732552 is about 880.1121379136.

The spelling of 681732552 in words is "six hundred eighty-one million, seven hundred thirty-two thousand, five hundred fifty-two".