7149611881 has 2 divisors, whose sum is σ = 7149611882. Its totient is φ = 7149611880.

The previous prime is 7149611837. The next prime is 7149611891. The reversal of 7149611881 is 1881169417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3801832281 + 3347779600 = 61659^2 + 57860^2 .

It is a cyclic number.

It is not a de Polignac number, because 7149611881 - 2⁹ = 7149611369 is a prime.

It is a super-2 number, since 2×7149611881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7149611891) 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 as a sum of consecutive naturals, namely, 3574805940 + 3574805941.

It is an arithmetic number, because the mean of its divisors is an integer number (3574805941).

Almost surely, 2^7149611881 is an apocalyptic number.

It is an amenable number.

7149611881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7149611881 is an equidigital number, since it uses as much as digits as its factorization.

7149611881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 46.

The square root of 7149611881 is about 84555.3775995353. The cubic root of 7149611881 is about 1926.4636650132.

The spelling of 7149611881 in words is "seven billion, one hundred forty-nine million, six hundred eleven thousand, eight hundred eighty-one".