25551550180 has 48 divisors (see below), whose sum is σ = 57923974080. Its totient is φ = 9411861888.

The previous prime is 25551550177. The next prime is 25551550183. The reversal of 25551550180 is 8105515552.

It is an interprime number because it is at equal distance from previous prime (25551550177) and next prime (25551550183).

It is not an unprimeable number, because it can be changed into a prime (25551550183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8334 + ... + 226213.

It is an arithmetic number, because the mean of its divisors is an integer number (1206749460).

Almost surely, 2^25551550180 is an apocalyptic number.

25551550180 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 25551550180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28961987040).

25551550180 is an abundant number, since it is smaller than the sum of its proper divisors (32372423900).

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

25551550180 is a wasteful number, since it uses less digits than its factorization.

25551550180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234988 (or 234986 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 37.

The spelling of 25551550180 in words is "twenty-five billion, five hundred fifty-one million, five hundred fifty thousand, one hundred eighty".