25550530320 has 160 divisors (see below), whose sum is σ = 90631913472. Its totient is φ = 5833022976.

The previous prime is 25550530279. The next prime is 25550530337. The reversal of 25550530320 is 2303505552.

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

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, 1441029 + ... + 1458651.

Almost surely, 2^25550530320 is an apocalyptic number.

25550530320 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 25550530320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45315956736).

25550530320 is an abundant number, since it is smaller than the sum of its proper divisors (65081383152).

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

25550530320 is a wasteful number, since it uses less digits than its factorization.

25550530320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18509 (or 18503 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 30.

The spelling of 25550530320 in words is "twenty-five billion, five hundred fifty million, five hundred thirty thousand, three hundred twenty".