45131809257 has 16 divisors (see below), whose sum is σ = 66876110080. Its totient is φ = 30081496176.

The previous prime is 45131809249. The next prime is 45131809291. The reversal of 45131809257 is 75290813154.

45131809257 is a `hidden beast` number, since 4 + 513 + 1 + 80 + 9 + 2 + 57 = 666.

It is not a de Polignac number, because 45131809257 - 2³ = 45131809249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45131808257) 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 15 ways as a sum of consecutive naturals, for example, 45598 + ... + 303879.

It is an arithmetic number, because the mean of its divisors is an integer number (4179756880).

Almost surely, 2^45131809257 is an apocalyptic number.

It is an amenable number.

45131809257 is a deficient number, since it is larger than the sum of its proper divisors (21744300823).

45131809257 is a wasteful number, since it uses less digits than its factorization.

45131809257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354269 (or 354263 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 45131809257 in words is "forty-five billion, one hundred thirty-one million, eight hundred nine thousand, two hundred fifty-seven".