45440131409 has 4 divisors (see below), whose sum is σ = 45462887604. Its totient is φ = 45417375216.

The previous prime is 45440131379. The next prime is 45440131469. The reversal of 45440131409 is 90413104454.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90413104454 = 2 ⋅45206552227.

It can be written as a sum of positive squares in 2 ways, for example, as 5263937809 + 40176193600 = 72553^2 + 200440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45440131409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45440131469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11375102 + ... + 11379095.

It is an arithmetic number, because the mean of its divisors is an integer number (11365721901).

Almost surely, 2^45440131409 is an apocalyptic number.

It is an amenable number.

45440131409 is a deficient number, since it is larger than the sum of its proper divisors (22756195).

45440131409 is a wasteful number, since it uses less digits than its factorization.

45440131409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22756194.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 45440131409 in words is "forty-five billion, four hundred forty million, one hundred thirty-one thousand, four hundred nine".