25815376384 has 160 divisors (see below), whose sum is σ = 63697708800. Its totient is φ = 10411720704.

The previous prime is 25815376381. The next prime is 25815376423. The reversal of 25815376384 is 48367351852.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25815376381) 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, 2981149 + ... + 2989795.

It is an arithmetic number, because the mean of its divisors is an integer number (398110680).

Almost surely, 2^25815376384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25815376384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31848854400).

25815376384 is an abundant number, since it is smaller than the sum of its proper divisors (37882332416).

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

25815376384 is an frugal number, since it uses more digits than its factorization.

25815376384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8703 (or 8673 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 52.

The spelling of 25815376384 in words is "twenty-five billion, eight hundred fifteen million, three hundred seventy-six thousand, three hundred eighty-four".