681180862 has 4 divisors (see below), whose sum is σ = 1021771296. Its totient is φ = 340590430.

The previous prime is 681180853. The next prime is 681180943. The reversal of 681180862 is 268081186.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 268081186 = 2 ⋅134040593.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170295214 + ... + 170295217.

It is an arithmetic number, because the mean of its divisors is an integer number (255442824).

Almost surely, 2^681180862 is an apocalyptic number.

681180862 is a deficient number, since it is larger than the sum of its proper divisors (340590434).

681180862 is a wasteful number, since it uses less digits than its factorization.

681180862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340590433.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 681180862 is about 26099.4417947971. The cubic root of 681180862 is about 879.8746644844.

The spelling of 681180862 in words is "six hundred eighty-one million, one hundred eighty thousand, eight hundred sixty-two".