25235235040 has 48 divisors (see below), whose sum is σ = 61541424000. Its totient is φ = 9768476160.

The previous prime is 25235235019. The next prime is 25235235041. The reversal of 25235235040 is 4053253252.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 25235234993 and 25235235011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25235235041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2538915 + ... + 2548834.

It is an arithmetic number, because the mean of its divisors is an integer number (1282113000).

Almost surely, 2^25235235040 is an apocalyptic number.

25235235040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25235235040 is an abundant number, since it is smaller than the sum of its proper divisors (36306188960).

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

25235235040 is a wasteful number, since it uses less digits than its factorization.

25235235040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5087795 (or 5087787 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 31.

Adding to 25235235040 its reverse (4053253252), we get a palindrome (29288488292).

The spelling of 25235235040 in words is "twenty-five billion, two hundred thirty-five million, two hundred thirty-five thousand, forty".