25261043220 has 72 divisors (see below), whose sum is σ = 87571620864. Its totient is φ = 5773952448.

The previous prime is 25261043207. The next prime is 25261043233. The reversal of 25261043220 is 2234016252.

It is a happy number.

25261043220 is a `hidden beast` number, since 2 + 5 + 2 + 610 + 43 + 2 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (25261043207) and next prime (25261043233).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10022964 + ... + 10025483.

It is an arithmetic number, because the mean of its divisors is an integer number (1216272512).

Almost surely, 2^25261043220 is an apocalyptic number.

25261043220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25261043220 is an abundant number, since it is smaller than the sum of its proper divisors (62310577644).

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

25261043220 is a wasteful number, since it uses less digits than its factorization.

25261043220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20048469 (or 20048464 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 25261043220 its reverse (2234016252), we get a palindrome (27495059472).

The spelling of 25261043220 in words is "twenty-five billion, two hundred sixty-one million, forty-three thousand, two hundred twenty".