25530140500 has 48 divisors (see below), whose sum is σ = 56066079888. Its totient is φ = 10155600000.

The previous prime is 25530140497. The next prime is 25530140501. The reversal of 25530140500 is 504103552.

It can be written as a sum of positive squares in 8 ways, for example, as 20173657156 + 5356483344 = 142034^2 + 73188^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25530140501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50551 + ... + 231550.

It is an arithmetic number, because the mean of its divisors is an integer number (1168043331).

Almost surely, 2^25530140500 is an apocalyptic number.

25530140500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25530140500 is an abundant number, since it is smaller than the sum of its proper divisors (30535939388).

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

25530140500 is a wasteful number, since it uses less digits than its factorization.

25530140500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282301 (or 282289 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The spelling of 25530140500 in words is "twenty-five billion, five hundred thirty million, one hundred forty thousand, five hundred".