25435565766042 has 64 divisors (see below), whose sum is σ = 51633241793280. Its totient is φ = 8351804160000.

The previous prime is 25435565765993. The next prime is 25435565766067. The reversal of 25435565766042 is 24066756553452.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1287801667 + ... + 1287821417.

It is an arithmetic number, because the mean of its divisors is an integer number (806769403020).

Almost surely, 2^{25435565766042} is an apocalyptic number.

25435565766042 is an abundant number, since it is smaller than the sum of its proper divisors (26197676027238).

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

25435565766042 is a wasteful number, since it uses less digits than its factorization.

25435565766042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23399.

The product of its (nonzero) digits is 181440000, while the sum is 60.

The spelling of 25435565766042 in words is "twenty-five trillion, four hundred thirty-five billion, five hundred sixty-five million, seven hundred sixty-six thousand, forty-two".