40448782505 has 4 divisors (see below), whose sum is σ = 48538539012. Its totient is φ = 32359026000.

The previous prime is 40448782489. The next prime is 40448782519. The reversal of 40448782505 is 50528784404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13832817769 + 26615964736 = 117613^2 + 163144^2 .

It is not a de Polignac number, because 40448782505 - 2⁴ = 40448782489 is a prime.

It is a super-2 number, since 2×40448782505² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40448782505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4044878246 + ... + 4044878255.

It is an arithmetic number, because the mean of its divisors is an integer number (12134634753).

Almost surely, 2^40448782505 is an apocalyptic number.

It is an amenable number.

40448782505 is a deficient number, since it is larger than the sum of its proper divisors (8089756507).

40448782505 is an equidigital number, since it uses as much as digits as its factorization.

40448782505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8089756506.

The product of its (nonzero) digits is 1433600, while the sum is 47.

The spelling of 40448782505 in words is "forty billion, four hundred forty-eight million, seven hundred eighty-two thousand, five hundred five".