25220003616 has 96 divisors (see below), whose sum is σ = 75269113920. Its totient is φ = 8211151872.

The previous prime is 25220003477. The next prime is 25220003617. The reversal of 25220003616 is 61630002252.

25220003616 is a `hidden beast` number, since 25 + 2 + 20 + 0 + 0 + 3 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 25220003616.

It is not an unprimeable number, because it can be changed into a prime (25220003617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302265 + ... + 376568.

It is an arithmetic number, because the mean of its divisors is an integer number (784053270).

Almost surely, 2^25220003616 is an apocalyptic number.

It is an amenable number.

25220003616 is an abundant number, since it is smaller than the sum of its proper divisors (50049110304).

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

25220003616 is a wasteful number, since it uses less digits than its factorization.

25220003616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678895 (or 678881 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 25220003616 its reverse (61630002252), we get a palindrome (86850005868).

The spelling of 25220003616 in words is "twenty-five billion, two hundred twenty million, three thousand, six hundred sixteen".