7541749881 has 12 divisors (see below), whose sum is σ = 10894933140. Its totient is φ = 5027235840.

The previous prime is 7541749867. The next prime is 7541749883. The reversal of 7541749881 is 1889471457.

7541749881 is a `hidden beast` number, since 7 + 541 + 7 + 4 + 98 + 8 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7171379856 + 370370025 = 84684^2 + 19245^2 .

It is not a de Polignac number, because 7541749881 - 2¹⁰ = 7541748857 is a prime.

It is a super-2 number, since 2×7541749881² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (7541749883) 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 11 ways as a sum of consecutive naturals, for example, 38385 + ... + 128673.

It is an arithmetic number, because the mean of its divisors is an integer number (907911095).

Almost surely, 2^7541749881 is an apocalyptic number.

It is an amenable number.

7541749881 is a deficient number, since it is larger than the sum of its proper divisors (3353183259).

7541749881 is a wasteful number, since it uses less digits than its factorization.

7541749881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99576 (or 99573 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 7541749881 is about 86843.2489085939. The cubic root of 7541749881 is about 1961.0592186225.

The spelling of 7541749881 in words is "seven billion, five hundred forty-one million, seven hundred forty-nine thousand, eight hundred eighty-one".