266153456322642 has 24 divisors (see below), whose sum is σ = 619214163690096. Its totient is φ = 76043844663528.

The previous prime is 266153456322623. The next prime is 266153456322709. The reversal of 266153456322642 is 246223654351662.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 452641932228 + ... + 452641932815.

It is an arithmetic number, because the mean of its divisors is an integer number (25800590153754).

Almost surely, 2^{266153456322642} is an apocalyptic number.

266153456322642 is an abundant number, since it is smaller than the sum of its proper divisors (353060707367454).

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

266153456322642 is a wasteful number, since it uses less digits than its factorization.

266153456322642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905283865062 (or 905283865055 counting only the distinct ones).

The product of its digits is 74649600, while the sum is 57.

The spelling of 266153456322642 in words is "two hundred sixty-six trillion, one hundred fifty-three billion, four hundred fifty-six million, three hundred twenty-two thousand, six hundred forty-two".