40221636025 has 6 divisors (see below), whose sum is σ = 49874828702. Its totient is φ = 32177308800.

The previous prime is 40221636023. The next prime is 40221636031. The reversal of 40221636025 is 52063612204.

It can be written as a sum of positive squares in 3 ways, for example, as 3998791696 + 36222844329 = 63236^2 + 190323^2 .

It is not a de Polignac number, because 40221636025 - 2¹ = 40221636023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40221636023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 804432696 + ... + 804432745.

Almost surely, 2^40221636025 is an apocalyptic number.

It is an amenable number.

40221636025 is a deficient number, since it is larger than the sum of its proper divisors (9653192677).

40221636025 is a wasteful number, since it uses less digits than its factorization.

40221636025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608865451 (or 1608865446 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 40221636025 in words is "forty billion, two hundred twenty-one million, six hundred thirty-six thousand, twenty-five".