1681011118 has 16 divisors (see below), whose sum is σ = 2606204160. Its totient is φ = 812707576.

The previous prime is 1681011113. The next prime is 1681011127. The reversal of 1681011118 is 8111101861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681011113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99928 + ... + 115531.

It is an arithmetic number, because the mean of its divisors is an integer number (162887760).

Almost surely, 2^1681011118 is an apocalyptic number.

1681011118 is a deficient number, since it is larger than the sum of its proper divisors (925193042).

1681011118 is a wasteful number, since it uses less digits than its factorization.

1681011118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215591.

The product of its (nonzero) digits is 384, while the sum is 28.

The square root of 1681011118 is about 41000.1355851417. The cubic root of 1681011118 is about 1189.0228350431.

Adding to 1681011118 its reverse (8111101861), we get a palindrome (9792112979).

The spelling of 1681011118 in words is "one billion, six hundred eighty-one million, eleven thousand, one hundred eighteen".