25116350520 has 128 divisors (see below), whose sum is σ = 79108876800. Its totient is φ = 6367071744.

The previous prime is 25116350449. The next prime is 25116350551. The reversal of 25116350520 is 2505361152.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 421966 + ... + 477794.

It is an arithmetic number, because the mean of its divisors is an integer number (618038100).

Almost surely, 2^25116350520 is an apocalyptic number.

25116350520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25116350520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39554438400).

25116350520 is an abundant number, since it is smaller than the sum of its proper divisors (53992526280).

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

25116350520 is a wasteful number, since it uses less digits than its factorization.

25116350520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56029 (or 56025 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 25116350520 in words is "twenty-five billion, one hundred sixteen million, three hundred fifty thousand, five hundred twenty".