1681159469 has 8 divisors (see below), whose sum is σ = 1847380608. Its totient is φ = 1517169760.

The previous prime is 1681159457. The next prime is 1681159489. The reversal of 1681159469 is 9649511861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1681159469 - 2⁴ = 1681159453 is a prime.

It is a super-2 number, since 2×1681159469² = 5652594320416723922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681159409) 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, 556277 + ... + 559290.

It is an arithmetic number, because the mean of its divisors is an integer number (230922576).

Almost surely, 2^1681159469 is an apocalyptic number.

It is an amenable number.

1681159469 is a deficient number, since it is larger than the sum of its proper divisors (166221139).

1681159469 is a wasteful number, since it uses less digits than its factorization.

1681159469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115715.

The product of its digits is 466560, while the sum is 50.

The square root of 1681159469 is about 41001.9446977823. The cubic root of 1681159469 is about 1189.0578115197.

The spelling of 1681159469 in words is "one billion, six hundred eighty-one million, one hundred fifty-nine thousand, four hundred sixty-nine".