40784018805 has 20 divisors (see below), whose sum is σ = 73109130732. Its totient is φ = 21751476480.

The previous prime is 40784018771. The next prime is 40784018813. The reversal of 40784018805 is 50881048704.

It can be written as a sum of positive squares in 2 ways, for example, as 24639266961 + 16144751844 = 156969^2 + 127062^2 .

It is not a de Polignac number, because 40784018805 - 2⁹ = 40784018293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 50350236 + ... + 50351045.

Almost surely, 2^40784018805 is an apocalyptic number.

40784018805 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40784018805 is a deficient number, since it is larger than the sum of its proper divisors (32325111927).

40784018805 is a wasteful number, since it uses less digits than its factorization.

40784018805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100701298 (or 100701289 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 45.

The spelling of 40784018805 in words is "forty billion, seven hundred eighty-four million, eighteen thousand, eight hundred five".