266423191023 has 32 divisors (see below), whose sum is σ = 418317488640. Its totient is φ = 149122413440.

The previous prime is 266423191007. The next prime is 266423191049. The reversal of 266423191023 is 320191324662.

It is not a de Polignac number, because 266423191023 - 2⁴ = 266423191007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266423191003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6030036 + ... + 6074057.

It is an arithmetic number, because the mean of its divisors is an integer number (13072421520).

Almost surely, 2^266423191023 is an apocalyptic number.

266423191023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

266423191023 is a deficient number, since it is larger than the sum of its proper divisors (151894297617).

266423191023 is a wasteful number, since it uses less digits than its factorization.

266423191023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12104159.

The product of its (nonzero) digits is 93312, while the sum is 39.

It can be divided in two parts, 266423 and 191023, that added together give a triangular number (457446 = T₉₅₆).

The spelling of 266423191023 in words is "two hundred sixty-six billion, four hundred twenty-three million, one hundred ninety-one thousand, twenty-three".