25435533240 has 192 divisors, whose sum is σ = 89616421440. Its totient is φ = 6219417600.

The previous prime is 25435533223. The next prime is 25435533251. The reversal of 25435533240 is 4233553452.

25435533240 is a `hidden beast` number, since 2 + 54 + 35 + 533 + 2 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25435533195 and 25435533204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 688684 + ... + 724676.

It is an arithmetic number, because the mean of its divisors is an integer number (466752195).

Almost surely, 2^25435533240 is an apocalyptic number.

25435533240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25435533240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44808210720).

25435533240 is an abundant number, since it is smaller than the sum of its proper divisors (64180888200).

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

25435533240 is a wasteful number, since it uses less digits than its factorization.

25435533240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36174 (or 36167 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 36.

The spelling of 25435533240 in words is "twenty-five billion, four hundred thirty-five million, five hundred thirty-three thousand, two hundred forty".