25378787505 has 8 divisors (see below), whose sum is σ = 40606060032. Its totient is φ = 13535353328.

The previous prime is 25378787477. The next prime is 25378787527. The reversal of 25378787505 is 50578787352.

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 25378787505 - 2¹⁶ = 25378721969 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, 845959569 + ... + 845959598.

It is an arithmetic number, because the mean of its divisors is an integer number (5075757504).

Almost surely, 2^25378787505 is an apocalyptic number.

It is an amenable number.

25378787505 is a deficient number, since it is larger than the sum of its proper divisors (15227272527).

25378787505 is a wasteful number, since it uses less digits than its factorization.

25378787505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691919175.

The product of its (nonzero) digits is 16464000, while the sum is 57.

The spelling of 25378787505 in words is "twenty-five billion, three hundred seventy-eight million, seven hundred eighty-seven thousand, five hundred five".