25740371985 has 8 divisors (see below), whose sum is σ = 41184595200. Its totient is φ = 13728198384.

The previous prime is 25740371963. The next prime is 25740372001. The reversal of 25740371985 is 58917304752.

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

It is not a de Polignac number, because 25740371985 - 2¹⁷ = 25740240913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 858012385 + ... + 858012414.

It is an arithmetic number, because the mean of its divisors is an integer number (5148074400).

Almost surely, 2^25740371985 is an apocalyptic number.

It is an amenable number.

25740371985 is a deficient number, since it is larger than the sum of its proper divisors (15444223215).

25740371985 is a wasteful number, since it uses less digits than its factorization.

25740371985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716024807.

The product of its (nonzero) digits is 2116800, while the sum is 51.

The spelling of 25740371985 in words is "twenty-five billion, seven hundred forty million, three hundred seventy-one thousand, nine hundred eighty-five".