25423260340040 has 64 divisors (see below), whose sum is σ = 57291903072000. Its totient is φ = 10153393431552.

The previous prime is 25423260340039. The next prime is 25423260340057. The reversal of 25423260340040 is 4004306232452.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66005936 + ... + 66389984.

It is an arithmetic number, because the mean of its divisors is an integer number (895185985500).

Almost surely, 2^{25423260340040} is an apocalyptic number.

25423260340040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25423260340040 is an abundant number, since it is smaller than the sum of its proper divisors (31868642731960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25423260340040 is a wasteful number, since it uses less digits than its factorization.

25423260340040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386646 (or 386642 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 25423260340040 its reverse (4004306232452), we get a palindrome (29427566572492).

The spelling of 25423260340040 in words is "twenty-five trillion, four hundred twenty-three billion, two hundred sixty million, three hundred forty thousand, forty".