45991134909 has 20 divisors (see below), whose sum is σ = 72744150204. Its totient is φ = 28857181824.

The previous prime is 45991134881. The next prime is 45991134947. The reversal of 45991134909 is 90943119954.

It is a happy number.

45991134909 is a `hidden beast` number, since 4 + 59 + 91 + 13 + 490 + 9 = 666.

45991134909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 38346255684 + 7644879225 = 195822^2 + 87435^2 .

It is not a de Polignac number, because 45991134909 - 2¹² = 45991130813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45991134979) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16698382 + ... + 16701135.

Almost surely, 2^45991134909 is an apocalyptic number.

It is an amenable number.

45991134909 is a deficient number, since it is larger than the sum of its proper divisors (26753015295).

45991134909 is a wasteful number, since it uses less digits than its factorization.

45991134909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33399546 (or 33399537 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 54.

The spelling of 45991134909 in words is "forty-five billion, nine hundred ninety-one million, one hundred thirty-four thousand, nine hundred nine".