266454142105631 has 4 divisors (see below), whose sum is σ = 266820653993712. Its totient is φ = 266087630217552.

The previous prime is 266454142105537. The next prime is 266454142105699. The reversal of 266454142105631 is 136501241454662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266454142105631 is a prime.

It is a super-2 number, since 2×266454142105631² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266454142105631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266454142105231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183255942950 + ... + 183255944403.

It is an arithmetic number, because the mean of its divisors is an integer number (66705163498428).

Almost surely, 2^{266454142105631} is an apocalyptic number.

266454142105631 is a deficient number, since it is larger than the sum of its proper divisors (366511888081).

266454142105631 is an equidigital number, since it uses as much as digits as its factorization.

266454142105631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366511888080.

The product of its (nonzero) digits is 4147200, while the sum is 50.

The spelling of 266454142105631 in words is "two hundred sixty-six trillion, four hundred fifty-four billion, one hundred forty-two million, one hundred five thousand, six hundred thirty-one".