40287791505 has 16 divisors (see below), whose sum is σ = 69418964160. Its totient is φ = 19833989568.

The previous prime is 40287791503. The next prime is 40287791543. The reversal of 40287791505 is 50519778204.

It is not a de Polignac number, because 40287791505 - 2¹ = 40287791503 is a prime.

It is a super-2 number, since 2×40287791505² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40287791503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103301835 + ... + 103302224.

It is an arithmetic number, because the mean of its divisors is an integer number (4338685260).

Almost surely, 2^40287791505 is an apocalyptic number.

It is an amenable number.

40287791505 is a deficient number, since it is larger than the sum of its proper divisors (29131172655).

40287791505 is a wasteful number, since it uses less digits than its factorization.

40287791505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206604080.

The product of its (nonzero) digits is 705600, while the sum is 48.

The spelling of 40287791505 in words is "forty billion, two hundred eighty-seven million, seven hundred ninety-one thousand, five hundred five".