25532776500 has 768 divisors, whose sum is σ = 97639686144. Its totient is φ = 5031936000.

The previous prime is 25532776469. The next prime is 25532776513. The reversal of 25532776500 is 567723552.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 263224452 + ... + 263224548.

It is an arithmetic number, because the mean of its divisors is an integer number (127135008).

Almost surely, 2^25532776500 is an apocalyptic number.

25532776500 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 25532776500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48819843072).

25532776500 is an abundant number, since it is smaller than the sum of its proper divisors (72106909644).

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

25532776500 is a wasteful number, since it uses less digits than its factorization.

25532776500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 441000, while the sum is 42.

The spelling of 25532776500 in words is "twenty-five billion, five hundred thirty-two million, seven hundred seventy-six thousand, five hundred".