25642413440 has 96 divisors (see below), whose sum is σ = 71309872800. Its totient is φ = 8791673856.

The previous prime is 25642413427. The next prime is 25642413481. The reversal of 25642413440 is 4431424652.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 25642413440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 377480 + ... + 440199.

It is an arithmetic number, because the mean of its divisors is an integer number (742811175).

Almost surely, 2^25642413440 is an apocalyptic number.

25642413440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25642413440 is an abundant number, since it is smaller than the sum of its proper divisors (45667459360).

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

25642413440 is an equidigital number, since it uses as much as digits as its factorization.

25642413440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817712 (or 817693 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 35.

The spelling of 25642413440 in words is "twenty-five billion, six hundred forty-two million, four hundred thirteen thousand, four hundred forty".