4018695681 has 144 divisors (see below), whose sum is σ = 7673108352. Its totient is φ = 1820206080.

The previous prime is 4018695679. The next prime is 4018695721. The reversal of 4018695681 is 1865968104.

It is not a de Polignac number, because 4018695681 - 2¹ = 4018695679 is a prime.

It is a super-2 number, since 2×4018695681² = 32299829952976107522, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4018695681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4018695481) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 11924745 + ... + 11925081.

Almost surely, 2^4018695681 is an apocalyptic number.

It is an amenable number.

4018695681 is a deficient number, since it is larger than the sum of its proper divisors (3654412671).

4018695681 is a wasteful number, since it uses less digits than its factorization.

4018695681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The square root of 4018695681 is about 63393.1832376321. The cubic root of 4018695681 is about 1589.8703375140.

The spelling of 4018695681 in words is "four billion, eighteen million, six hundred ninety-five thousand, six hundred eighty-one".