1681886154 has 16 divisors (see below), whose sum is σ = 3622524192. Its totient is φ = 517503408.

The previous prime is 1681886131. The next prime is 1681886189. The reversal of 1681886154 is 4516881861.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10781244 + ... + 10781399.

It is an arithmetic number, because the mean of its divisors is an integer number (226407762).

Almost surely, 2^1681886154 is an apocalyptic number.

1681886154 is an abundant number, since it is smaller than the sum of its proper divisors (1940638038).

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

1681886154 is a wasteful number, since it uses less digits than its factorization.

1681886154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21562661.

The product of its digits is 368640, while the sum is 48.

The square root of 1681886154 is about 41010.8053322536. The cubic root of 1681886154 is about 1189.2291111540.

The spelling of 1681886154 in words is "one billion, six hundred eighty-one million, eight hundred eighty-six thousand, one hundred fifty-four".