39802245025 has 9 divisors (see below), whose sum is σ = 49356020793. Its totient is φ = 31840998000.

The previous prime is 39802245023. The next prime is 39802245079. The reversal of 39802245025 is 52054220893.

The square root of 39802245025 is 199505.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 17369394849 + 22432850176 = 131793^2 + 149776^2 .

It is not a de Polignac number, because 39802245025 - 2¹ = 39802245023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39802245023) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 977575 + ... + 1017475.

Almost surely, 2^39802245025 is an apocalyptic number.

39802245025 is the 199505-th square number.

39802245025 is the 99753-rd centered octagonal number.

It is an amenable number.

39802245025 is a deficient number, since it is larger than the sum of its proper divisors (9553775768).

39802245025 is an frugal number, since it uses more digits than its factorization.

39802245025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79812 (or 39906 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 39802245025 in words is "thirty-nine billion, eight hundred two million, two hundred forty-five thousand, twenty-five".