25216515606 has 16 divisors (see below), whose sum is σ = 51663105648. Its totient is φ = 8200492800.

The previous prime is 25216515601. The next prime is 25216515619. The reversal of 25216515606 is 60651561252.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25216515601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51252835 + ... + 51253326.

It is an arithmetic number, because the mean of its divisors is an integer number (3228944103).

Almost surely, 2^25216515606 is an apocalyptic number.

25216515606 is an abundant number, since it is smaller than the sum of its proper divisors (26446590042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25216515606 is a wasteful number, since it uses less digits than its factorization.

25216515606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102506207.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 25216515606 in words is "twenty-five billion, two hundred sixteen million, five hundred fifteen thousand, six hundred six".