25506854912 has 192 divisors, whose sum is σ = 66940473600. Its totient is φ = 9413591040.

The previous prime is 25506854881. The next prime is 25506854921. The reversal of 25506854912 is 21945860552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2991968 + ... + 3000480.

It is an arithmetic number, because the mean of its divisors is an integer number (348648300).

Almost surely, 2^25506854912 is an apocalyptic number.

25506854912 is a gapful number since it is divisible by the number (22) 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 25506854912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33470236800).

25506854912 is an abundant number, since it is smaller than the sum of its proper divisors (41433618688).

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

25506854912 is a wasteful number, since it uses less digits than its factorization.

25506854912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8572 (or 8552 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 25506854912 in words is "twenty-five billion, five hundred six million, eight hundred fifty-four thousand, nine hundred twelve".