25541695878 has 16 divisors (see below), whose sum is σ = 51589169136. Its totient is φ = 8429602400.

The previous prime is 25541695871. The next prime is 25541695939. The reversal of 25541695878 is 87859614552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25541695871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21073401 + ... + 21074612.

It is an arithmetic number, because the mean of its divisors is an integer number (3224323071).

Almost surely, 2^25541695878 is an apocalyptic number.

25541695878 is an abundant number, since it is smaller than the sum of its proper divisors (26047473258).

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

25541695878 is a wasteful number, since it uses less digits than its factorization.

25541695878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42148119.

The product of its digits is 24192000, while the sum is 60.

The spelling of 25541695878 in words is "twenty-five billion, five hundred forty-one million, six hundred ninety-five thousand, eight hundred seventy-eight".