266521001245536 has 48 divisors (see below), whose sum is σ = 700559240338944. Its totient is φ = 88720763961984.

The previous prime is 266521001245531. The next prime is 266521001245537. The reversal of 266521001245536 is 635542100125662.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266521001245531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1868206216 + ... + 1868348871.

It is an arithmetic number, because the mean of its divisors is an integer number (14594984173728).

Almost surely, 2^{266521001245536} is an apocalyptic number.

It is an amenable number.

266521001245536 is an abundant number, since it is smaller than the sum of its proper divisors (434038239093408).

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

266521001245536 is a wasteful number, since it uses less digits than its factorization.

266521001245536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3736555843 (or 3736555835 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 266521001245536 in words is "two hundred sixty-six trillion, five hundred twenty-one billion, one million, two hundred forty-five thousand, five hundred thirty-six".