4149475681 has 8 divisors (see below), whose sum is σ = 4475646504. Its totient is φ = 3824302080.

The previous prime is 4149475657. The next prime is 4149475703. The reversal of 4149475681 is 1865749414.

It can be written as a sum of positive squares in 4 ways, for example, as 1036840000 + 3112635681 = 32200^2 + 55791^2 .

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 4149475681 - 2¹³ = 4149467489 is a prime.

It is a super-2 number, since 2×4149475681² = 34436296854420827522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4149475381) 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, 240646 + ... + 257311.

It is an arithmetic number, because the mean of its divisors is an integer number (559455813).

Almost surely, 2^4149475681 is an apocalyptic number.

It is an amenable number.

4149475681 is a deficient number, since it is larger than the sum of its proper divisors (326170823).

4149475681 is a wasteful number, since it uses less digits than its factorization.

4149475681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498611.

The product of its digits is 967680, while the sum is 49.

The square root of 4149475681 is about 64416.4240004054. The cubic root of 4149475681 is about 1606.9328952596.

The spelling of 4149475681 in words is "four billion, one hundred forty-nine million, four hundred seventy-five thousand, six hundred eighty-one".