40538405025 has 18 divisors (see below), whose sum is σ = 72608788070. Its totient is φ = 21620482560.

The previous prime is 40538405009. The next prime is 40538405029. The reversal of 40538405025 is 52050483504.

It can be written as a sum of positive squares in 3 ways, for example, as 262731681 + 40275673344 = 16209^2 + 200688^2 .

It is not a de Polignac number, because 40538405025 - 2⁴ = 40538405009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40538405029) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 90085120 + ... + 90085569.

Almost surely, 2^40538405025 is an apocalyptic number.

40538405025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40538405025 is a deficient number, since it is larger than the sum of its proper divisors (32070383045).

40538405025 is a wasteful number, since it uses less digits than its factorization.

40538405025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180170705 (or 180170697 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

Adding to 40538405025 its reverse (52050483504), we get a palindrome (92588888529).

The spelling of 40538405025 in words is "forty billion, five hundred thirty-eight million, four hundred five thousand, twenty-five".