25500012000 has 96 divisors (see below), whose sum is σ = 83538078624. Its totient is φ = 6800000000.

The previous prime is 25500011969. The next prime is 25500012001. The reversal of 25500012000 is 21000552.

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

It is a super-2 number, since 2×25500012000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25500012001) 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, 1050501 + ... + 1074500.

It is an arithmetic number, because the mean of its divisors is an integer number (870188319).

Almost surely, 2^25500012000 is an apocalyptic number.

25500012000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25500012000 is an abundant number, since it is smaller than the sum of its proper divisors (58038066624).

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

25500012000 is a wasteful number, since it uses less digits than its factorization.

25500012000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125029 (or 2125011 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

Adding to 25500012000 its reverse (21000552), we get a palindrome (25521012552).

The spelling of 25500012000 in words is "twenty-five billion, five hundred million, twelve thousand".