25911380544 has 112 divisors (see below), whose sum is σ = 78489218688. Its totient is φ = 7390199808.

The previous prime is 25911380527. The next prime is 25911380609. The reversal of 25911380544 is 44508311952.

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

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 25911380496 and 25911380505.

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, 758782 + ... + 792194.

Almost surely, 2^25911380544 is an apocalyptic number.

25911380544 is a gapful number since it is divisible by the number (24) 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 25911380544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39244609344).

25911380544 is an abundant number, since it is smaller than the sum of its proper divisors (52577838144).

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

25911380544 is a wasteful number, since it uses less digits than its factorization.

25911380544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34012 (or 34002 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 25911380544 in words is "twenty-five billion, nine hundred eleven million, three hundred eighty thousand, five hundred forty-four".