40065047808 has 144 divisors (see below), whose sum is σ = 110776885632. Its totient is φ = 12845056000.

The previous prime is 40065047797. The next prime is 40065047809. The reversal of 40065047808 is 80874056004.

It is a self number, because there is not a number n which added to its sum of digits gives 40065047808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40065047809) 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, 2226688 + ... + 2244608.

It is an arithmetic number, because the mean of its divisors is an integer number (769283928).

Almost surely, 2^40065047808 is an apocalyptic number.

40065047808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40065047808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55388442816).

40065047808 is an abundant number, since it is smaller than the sum of its proper divisors (70711837824).

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

40065047808 is a wasteful number, since it uses less digits than its factorization.

40065047808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18052 (or 18038 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The spelling of 40065047808 in words is "forty billion, sixty-five million, forty-seven thousand, eight hundred eight".