25549428000 has 96 divisors (see below), whose sum is σ = 83699965440. Its totient is φ = 6813177600.

The previous prime is 25549427989. The next prime is 25549428001. The reversal of 25549428000 is 82494552.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×25549428000² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25549428000.

It is not an unprimeable number, because it can be changed into a prime (25549428001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1052560 + ... + 1076559.

It is an arithmetic number, because the mean of its divisors is an integer number (871874640).

Almost surely, 2^25549428000 is an apocalyptic number.

25549428000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25549428000 is an abundant number, since it is smaller than the sum of its proper divisors (58150537440).

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

25549428000 is a wasteful number, since it uses less digits than its factorization.

25549428000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129147 (or 2129129 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The spelling of 25549428000 in words is "twenty-five billion, five hundred forty-nine million, four hundred twenty-eight thousand".