40005020025 has 18 divisors (see below), whose sum is σ = 71653436270. Its totient is φ = 21336010560.

The previous prime is 40005019991. The next prime is 40005020051. The reversal of 40005020025 is 52002050004.

It can be written as a sum of positive squares in 3 ways, for example, as 12045501504 + 27959518521 = 109752^2 + 167211^2 .

It is not a de Polignac number, because 40005020025 - 2¹⁷ = 40004888953 is a prime.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 88899820 + ... + 88900269.

Almost surely, 2^40005020025 is an apocalyptic number.

40005020025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40005020025 is a deficient number, since it is larger than the sum of its proper divisors (31648416245).

40005020025 is a wasteful number, since it uses less digits than its factorization.

40005020025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177800105 (or 177800097 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

Adding to 40005020025 its reverse (52002050004), we get a palindrome (92007070029).

The spelling of 40005020025 in words is "forty billion, five million, twenty thousand, twenty-five".