40808871540 has 36 divisors (see below), whose sum is σ = 123786910884. Its totient is φ = 10882365696.

The previous prime is 40808871539. The next prime is 40808871547. The reversal of 40808871540 is 4517880804.

It can be written as a sum of positive squares in 2 ways, for example, as 32534058384 + 8274813156 = 180372^2 + 90966^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40808871547) 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 11 ways as a sum of consecutive naturals, for example, 113357797 + ... + 113358156.

Almost surely, 2^40808871540 is an apocalyptic number.

It is an amenable number.

40808871540 is an abundant number, since it is smaller than the sum of its proper divisors (82978039344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40808871540 is a wasteful number, since it uses less digits than its factorization.

40808871540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226715968 (or 226715963 counting only the distinct ones).

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

The spelling of 40808871540 in words is "forty billion, eight hundred eight million, eight hundred seventy-one thousand, five hundred forty".