266438326485 has 16 divisors (see below), whose sum is σ = 448738234560. Its totient is φ = 134621470080.

The previous prime is 266438326457. The next prime is 266438326543. The reversal of 266438326485 is 584623834662.

It is a happy number.

It is not a de Polignac number, because 266438326485 - 2⁸ = 266438326229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467435376 + ... + 467435945.

It is an arithmetic number, because the mean of its divisors is an integer number (28046139660).

Almost surely, 2^266438326485 is an apocalyptic number.

It is an amenable number.

266438326485 is a deficient number, since it is larger than the sum of its proper divisors (182299908075).

266438326485 is a wasteful number, since it uses less digits than its factorization.

266438326485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934871348.

The product of its digits is 39813120, while the sum is 57.

The spelling of 266438326485 in words is "two hundred sixty-six billion, four hundred thirty-eight million, three hundred twenty-six thousand, four hundred eighty-five".