25541311040 has 112 divisors (see below), whose sum is σ = 70040260224. Its totient is φ = 8690073600.

The previous prime is 25541311001. The next prime is 25541311049. The reversal of 25541311040 is 4011314552.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (25541311049) 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, 249920 + ... + 336960.

Almost surely, 2^25541311040 is an apocalyptic number.

25541311040 is a gapful number since it is divisible by the number (20) 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 25541311040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35020130112).

25541311040 is an abundant number, since it is smaller than the sum of its proper divisors (44498949184).

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

25541311040 is a wasteful number, since it uses less digits than its factorization.

25541311040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87196 (or 87186 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 25541311040 its reverse (4011314552), we get a palindrome (29552625592).

The spelling of 25541311040 in words is "twenty-five billion, five hundred forty-one million, three hundred eleven thousand, forty".