25211208320 has 64 divisors (see below), whose sum is σ = 61740622440. Its totient is φ = 9838510080.

The previous prime is 25211208307. The next prime is 25211208331. The reversal of 25211208320 is 2380211252.

It can be written as a sum of positive squares in 4 ways, for example, as 17846822464 + 7364385856 = 133592^2 + 85816^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 25211208320.

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, 454157 + ... + 506636.

Almost surely, 2^25211208320 is an apocalyptic number.

25211208320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25211208320 is an abundant number, since it is smaller than the sum of its proper divisors (36529414120).

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

25211208320 is an equidigital number, since it uses as much as digits as its factorization.

25211208320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960853 (or 960841 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 25211208320 its reverse (2380211252), we get a palindrome (27591419572).

The spelling of 25211208320 in words is "twenty-five billion, two hundred eleven million, two hundred eight thousand, three hundred twenty".