25006940509 has 8 divisors (see below), whose sum is σ = 26799448320. Its totient is φ = 23273203536.

The previous prime is 25006940503. The next prime is 25006940537. The reversal of 25006940509 is 90504960052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25006940509 - 2¹⁹ = 25006416221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25006940503) 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, 14691829 + ... + 14693530.

It is an arithmetic number, because the mean of its divisors is an integer number (3349931040).

Almost surely, 2^25006940509 is an apocalyptic number.

It is an amenable number.

25006940509 is a deficient number, since it is larger than the sum of its proper divisors (1792507811).

25006940509 is a wasteful number, since it uses less digits than its factorization.

25006940509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29385419.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 25006940509 in words is "twenty-five billion, six million, nine hundred forty thousand, five hundred nine".