40201009999 has 4 divisors (see below), whose sum is σ = 41181522480. Its totient is φ = 39220497520.

The previous prime is 40201009883. The next prime is 40201010093. The reversal of 40201009999 is 99990010204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40201009999 - 2⁹ = 40201009487 is a prime.

It is a super-2 number, since 2×40201009999² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40201009099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490256179 + ... + 490256260.

It is an arithmetic number, because the mean of its divisors is an integer number (10295380620).

Almost surely, 2^40201009999 is an apocalyptic number.

40201009999 is a deficient number, since it is larger than the sum of its proper divisors (980512481).

40201009999 is an equidigital number, since it uses as much as digits as its factorization.

40201009999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980512480.

The product of its (nonzero) digits is 52488, while the sum is 43.

The spelling of 40201009999 in words is "forty billion, two hundred one million, nine thousand, nine hundred ninety-nine".