40147188809 has 64 divisors (see below), whose sum is σ = 52813555200. Its totient is φ = 29660940288.

The previous prime is 40147188749. The next prime is 40147188821. The reversal of 40147188809 is 90888174104.

It is a happy number.

It is not a de Polignac number, because 40147188809 - 2²⁴ = 40130411593 is a prime.

It is a super-2 number, since 2×40147188809² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40147188839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17476949 + ... + 17479245.

It is an arithmetic number, because the mean of its divisors is an integer number (825211800).

Almost surely, 2^40147188809 is an apocalyptic number.

It is an amenable number.

40147188809 is a deficient number, since it is larger than the sum of its proper divisors (12666366391).

40147188809 is a wasteful number, since it uses less digits than its factorization.

40147188809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562.

The product of its (nonzero) digits is 516096, while the sum is 50.

The spelling of 40147188809 in words is "forty billion, one hundred forty-seven million, one hundred eighty-eight thousand, eight hundred nine".