1681451889 has 16 divisors (see below), whose sum is σ = 2425231872. Its totient is φ = 1030094208.

The previous prime is 1681451887. The next prime is 1681451897. The reversal of 1681451889 is 9881541861.

1681451889 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1681451889 - 2¹ = 1681451887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1681451881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87972 + ... + 105365.

It is an arithmetic number, because the mean of its divisors is an integer number (151576992).

Almost surely, 2^1681451889 is an apocalyptic number.

It is an amenable number.

1681451889 is a deficient number, since it is larger than the sum of its proper divisors (743779983).

1681451889 is a wasteful number, since it uses less digits than its factorization.

1681451889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193576.

The product of its digits is 552960, while the sum is 51.

The square root of 1681451889 is about 41005.5104711550. The cubic root of 1681451889 is about 1189.1267488878.

The spelling of 1681451889 in words is "one billion, six hundred eighty-one million, four hundred fifty-one thousand, eight hundred eighty-nine".