25487673499 has 4 divisors (see below), whose sum is σ = 26080410136. Its totient is φ = 24894936864.

The previous prime is 25487673461. The next prime is 25487673511. The reversal of 25487673499 is 99437678452.

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 25487673499 - 2²³ = 25479284891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25487673499.

It is not an unprimeable number, because it can be changed into a prime (25487670499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296368254 + ... + 296368339.

It is an arithmetic number, because the mean of its divisors is an integer number (6520102534).

Almost surely, 2^25487673499 is an apocalyptic number.

25487673499 is a deficient number, since it is larger than the sum of its proper divisors (592736637).

25487673499 is an equidigital number, since it uses as much as digits as its factorization.

25487673499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592736636.

The product of its digits is 91445760, while the sum is 64.

The spelling of 25487673499 in words is "twenty-five billion, four hundred eighty-seven million, six hundred seventy-three thousand, four hundred ninety-nine".