681149358 has 32 divisors (see below), whose sum is σ = 1514524320. Its totient is φ = 226920960.

The previous prime is 681149321. The next prime is 681149389. The reversal of 681149358 is 853941186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167388 + ... + 171408.

It is an arithmetic number, because the mean of its divisors is an integer number (47328885).

Almost surely, 2^681149358 is an apocalyptic number.

681149358 is an abundant number, since it is smaller than the sum of its proper divisors (833374962).

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

681149358 is a wasteful number, since it uses less digits than its factorization.

681149358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7169 (or 7163 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 681149358 is about 26098.8382500065. The cubic root of 681149358 is about 879.8610998056.

It can be divided in two parts, 6811 and 49358, that added together give a square (56169 = 237²).

The spelling of 681149358 in words is "six hundred eighty-one million, one hundred forty-nine thousand, three hundred fifty-eight".