5149181961 has 64 divisors (see below), whose sum is σ = 9713295360. Its totient is φ = 2617937280.

The previous prime is 5149181951. The next prime is 5149181977. The reversal of 5149181961 is 1691819415.

5149181961 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5149181961 - 2¹⁷ = 5149050889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5149181911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71365 + ... + 124061.

It is an arithmetic number, because the mean of its divisors is an integer number (151770240).

Almost surely, 2^5149181961 is an apocalyptic number.

It is an amenable number.

5149181961 is a deficient number, since it is larger than the sum of its proper divisors (4564113399).

5149181961 is a wasteful number, since it uses less digits than its factorization.

5149181961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52771 (or 52765 counting only the distinct ones).

The product of its digits is 77760, while the sum is 45.

The square root of 5149181961 is about 71757.8006979032. The cubic root of 5149181961 is about 1726.8160624442.

The spelling of 5149181961 in words is "five billion, one hundred forty-nine million, one hundred eighty-one thousand, nine hundred sixty-one".