25512415163 has 4 divisors (see below), whose sum is σ = 25515902568. Its totient is φ = 25508927760.

The previous prime is 25512415141. The next prime is 25512415171. The reversal of 25512415163 is 36151421552.

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 25512415163 - 2⁶ = 25512415099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25512415463) 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, 1732706 + ... + 1747367.

It is an arithmetic number, because the mean of its divisors is an integer number (6378975642).

Almost surely, 2^25512415163 is an apocalyptic number.

25512415163 is a deficient number, since it is larger than the sum of its proper divisors (3487405).

25512415163 is an equidigital number, since it uses as much as digits as its factorization.

25512415163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3487404.

The product of its digits is 36000, while the sum is 35.

The spelling of 25512415163 in words is "twenty-five billion, five hundred twelve million, four hundred fifteen thousand, one hundred sixty-three".