25502802775278 has 48 divisors (see below), whose sum is σ = 54333352575360. Its totient is φ = 7978592535424.

The previous prime is 25502802775273. The next prime is 25502802775291. The reversal of 25502802775278 is 87257720820552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25502802775271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19861476 + ... + 21106487.

It is an arithmetic number, because the mean of its divisors is an integer number (1131944845320).

Almost surely, 2^{25502802775278} is an apocalyptic number.

25502802775278 is an abundant number, since it is smaller than the sum of its proper divisors (28830549800082).

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

25502802775278 is a wasteful number, since it uses less digits than its factorization.

25502802775278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40968361 (or 40968344 counting only the distinct ones).

The product of its (nonzero) digits is 43904000, while the sum is 60.

The spelling of 25502802775278 in words is "twenty-five trillion, five hundred two billion, eight hundred two million, seven hundred seventy-five thousand, two hundred seventy-eight".