40704782781 has 16 divisors (see below), whose sum is σ = 59406058880. Its totient is φ = 24638454720.

The previous prime is 40704782743. The next prime is 40704782819. The reversal of 40704782781 is 18728740704.

It is an interprime number because it is at equal distance from previous prime (40704782743) and next prime (40704782819).

It is not a de Polignac number, because 40704782781 - 2¹³ = 40704774589 is a prime.

It is a super-2 number, since 2×40704782781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40704782781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40704782081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8552641 + ... + 8557398.

It is an arithmetic number, because the mean of its divisors is an integer number (3712878680).

Almost surely, 2^40704782781 is an apocalyptic number.

It is an amenable number.

40704782781 is a deficient number, since it is larger than the sum of its proper divisors (18701276099).

40704782781 is a wasteful number, since it uses less digits than its factorization.

40704782781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17110116.

The product of its (nonzero) digits is 702464, while the sum is 48.

The spelling of 40704782781 in words is "forty billion, seven hundred four million, seven hundred eighty-two thousand, seven hundred eighty-one".