25287746404279 has 4 divisors (see below), whose sum is σ = 25308189207784. Its totient is φ = 25267303600776.

The previous prime is 25287746404267. The next prime is 25287746404321. The reversal of 25287746404279 is 97240464778252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25287746404279 - 2¹¹ = 25287746402231 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 (25287746404259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10221399897 + ... + 10221402370.

It is an arithmetic number, because the mean of its divisors is an integer number (6327047301946).

Almost surely, 2^{25287746404279} is an apocalyptic number.

25287746404279 is a deficient number, since it is larger than the sum of its proper divisors (20442803505).

25287746404279 is a wasteful number, since it uses less digits than its factorization.

25287746404279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20442803504.

The product of its (nonzero) digits is 379330560, while the sum is 67.

The spelling of 25287746404279 in words is "twenty-five trillion, two hundred eighty-seven billion, seven hundred forty-six million, four hundred four thousand, two hundred seventy-nine".