1681158308 has 6 divisors (see below), whose sum is σ = 2942027046. Its totient is φ = 840579152.

The previous prime is 1681158299. The next prime is 1681158317. The reversal of 1681158308 is 8038511861.

It is an interprime number because it is at equal distance from previous prime (1681158299) and next prime (1681158317).

It can be written as a sum of positive squares in only one way, i.e., 1363677184 + 317481124 = 36928^2 + 17818^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210144785 + ... + 210144792.

It is an arithmetic number, because the mean of its divisors is an integer number (490337841).

Almost surely, 2^1681158308 is an apocalyptic number.

It is an amenable number.

1681158308 is a deficient number, since it is larger than the sum of its proper divisors (1260868738).

1681158308 is a wasteful number, since it uses less digits than its factorization.

1681158308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420289581 (or 420289579 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 1681158308 is about 41001.9305399148. The cubic root of 1681158308 is about 1189.0575378006.

The spelling of 1681158308 in words is "one billion, six hundred eighty-one million, one hundred fifty-eight thousand, three hundred eight".