25278000005 has 8 divisors (see below), whose sum is σ = 31312103424. Its totient is φ = 19570064400.

The previous prime is 25277999963. The next prime is 25278000031. The reversal of 25278000005 is 50000087252.

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

It is not a de Polignac number, because 25278000005 - 2⁸ = 25277999749 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 81541781 + ... + 81542090.

It is an arithmetic number, because the mean of its divisors is an integer number (3914012928).

Almost surely, 2^25278000005 is an apocalyptic number.

It is an amenable number.

25278000005 is a deficient number, since it is larger than the sum of its proper divisors (6034103419).

25278000005 is a wasteful number, since it uses less digits than its factorization.

25278000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163083907.

The product of its (nonzero) digits is 5600, while the sum is 29.

Adding to 25278000005 its reverse (50000087252), we get a palindrome (75278087257).

The spelling of 25278000005 in words is "twenty-five billion, two hundred seventy-eight million, five", and thus it is an aban number.