25541215212066 has 8 divisors (see below), whose sum is σ = 51082430424144. Its totient is φ = 8513738404020.

The previous prime is 25541215212001. The next prime is 25541215212083. The reversal of 25541215212066 is 66021251214552.

It is a sphenic number, since it is the product of 3 distinct primes.

25541215212066 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2128434601000 + ... + 2128434601011.

It is an arithmetic number, because the mean of its divisors is an integer number (6385303803018).

Almost surely, 2^{25541215212066} is an apocalyptic number.

25541215212066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25541215212066 is a wasteful number, since it uses less digits than its factorization.

25541215212066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256869202016.

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 25541215212066 in words is "twenty-five trillion, five hundred forty-one billion, two hundred fifteen million, two hundred twelve thousand, sixty-six".