25406662040 has 64 divisors (see below), whose sum is σ = 60045788160. Its totient is φ = 9656380800.

The previous prime is 25406662007. The next prime is 25406662049. The reversal of 25406662040 is 4026660452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25406662049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47477 + ... + 230363.

It is an arithmetic number, because the mean of its divisors is an integer number (938215440).

Almost surely, 2^25406662040 is an apocalyptic number.

25406662040 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 25406662040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30022894080).

25406662040 is an abundant number, since it is smaller than the sum of its proper divisors (34639126120).

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

25406662040 is a wasteful number, since it uses less digits than its factorization.

25406662040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183072 (or 183068 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 25406662040 in words is "twenty-five billion, four hundred six million, six hundred sixty-two thousand, forty".