1681159470 has 64 divisors (see below), whose sum is σ = 4289739264. Its totient is φ = 420717440.

The previous prime is 1681159457. The next prime is 1681159489. The reversal of 1681159470 is 749511861.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13585 + ... + 59555.

It is an arithmetic number, because the mean of its divisors is an integer number (67027176).

Almost surely, 2^1681159470 is an apocalyptic number.

1681159470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1681159470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2144869632).

1681159470 is an abundant number, since it is smaller than the sum of its proper divisors (2608579794).

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

1681159470 is a wasteful number, since it uses less digits than its factorization.

1681159470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46057.

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 1681159470 is about 41001.9447099769. The cubic root of 1681159470 is about 1189.0578117555.

The spelling of 1681159470 in words is "one billion, six hundred eighty-one million, one hundred fifty-nine thousand, four hundred seventy".