3545917681 has 8 divisors (see below), whose sum is σ = 3855974760. Its totient is φ = 3247135488.

The previous prime is 3545917673. The next prime is 3545917699. The reversal of 3545917681 is 1867195453.

It can be written as a sum of positive squares in 4 ways, for example, as 530150625 + 3015767056 = 23025^2 + 54916^2 .

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 3545917681 - 2³ = 3545917673 is a prime.

It is a super-2 number, since 2×3545917681² = 25147064400856835522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3545917621) by changing a digit.

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, 2818066 + ... + 2819323.

It is an arithmetic number, because the mean of its divisors is an integer number (481996845).

Almost surely, 2^3545917681 is an apocalyptic number.

It is an amenable number.

3545917681 is a deficient number, since it is larger than the sum of its proper divisors (310057079).

3545917681 is a wasteful number, since it uses less digits than its factorization.

3545917681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5637443.

The product of its digits is 907200, while the sum is 49.

The square root of 3545917681 is about 59547.6085246083. The cubic root of 3545917681 is about 1524.9053322583.

The spelling of 3545917681 in words is "three billion, five hundred forty-five million, nine hundred seventeen thousand, six hundred eighty-one".