25320442040 has 16 divisors (see below), whose sum is σ = 56970994680. Its totient is φ = 10128176800.

The previous prime is 25320442003. The next prime is 25320442067. The reversal of 25320442040 is 4024402352.

It is a happy number.

It is a super-2 number, since 2×25320442040² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316505486 + ... + 316505565.

Almost surely, 2^25320442040 is an apocalyptic number.

25320442040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25320442040 is an abundant number, since it is smaller than the sum of its proper divisors (31650552640).

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

25320442040 is a wasteful number, since it uses less digits than its factorization.

25320442040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633011062 (or 633011058 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

Adding to 25320442040 its reverse (4024402352), we get a palindrome (29344844392).

The spelling of 25320442040 in words is "twenty-five billion, three hundred twenty million, four hundred forty-two thousand, forty".