25541636012340 has 384 divisors, whose sum is σ = 88410652581888. Its totient is φ = 5382545541120.

The previous prime is 25541636012329. The next prime is 25541636012381. The reversal of 25541636012340 is 4321063614552.

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 = 25541636012292 and 25541636012301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 37910010 + ... + 38577870.

It is an arithmetic number, because the mean of its divisors is an integer number (230236074432).

Almost surely, 2^{25541636012340} is an apocalyptic number.

25541636012340 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 25541636012340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44205326290944).

25541636012340 is an abundant number, since it is smaller than the sum of its proper divisors (62869016569548).

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

25541636012340 is a wasteful number, since it uses less digits than its factorization.

25541636012340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668047 (or 668045 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

Adding to 25541636012340 its reverse (4321063614552), we get a palindrome (29862699626892).

The spelling of 25541636012340 in words is "twenty-five trillion, five hundred forty-one billion, six hundred thirty-six million, twelve thousand, three hundred forty".