40138075705285 has 4 divisors (see below), whose sum is σ = 48165690846348. Its totient is φ = 32110460564224.

The previous prime is 40138075705283. The next prime is 40138075705319. The reversal of 40138075705285 is 58250757083104.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9312494483044 + 30825581222241 = 3051638^2 + 5552079^2 .

It is a cyclic number.

It is not a de Polignac number, because 40138075705285 - 2¹ = 40138075705283 is a prime.

It is a super-2 number, since 2×40138075705285² (a number of 28 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 (40138075705283) 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, 4013807570524 + ... + 4013807570533.

It is an arithmetic number, because the mean of its divisors is an integer number (12041422711587).

Almost surely, 2^{40138075705285} is an apocalyptic number.

It is an amenable number.

40138075705285 is a deficient number, since it is larger than the sum of its proper divisors (8027615141063).

40138075705285 is an equidigital number, since it uses as much as digits as its factorization.

40138075705285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8027615141062.

The product of its (nonzero) digits is 9408000, while the sum is 55.

The spelling of 40138075705285 in words is "forty trillion, one hundred thirty-eight billion, seventy-five million, seven hundred five thousand, two hundred eighty-five".