43264263326561 has 4 divisors (see below), whose sum is σ = 44659884724224. Its totient is φ = 41868641928900.

The previous prime is 43264263326533. The next prime is 43264263326569. The reversal of 43264263326561 is 16562336246234.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43264263326561 - 2³⁴ = 43247083457377 is a prime.

It is a super-2 number, since 2×43264263326561² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43264263326569) 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, 697810698785 + ... + 697810698846.

It is an arithmetic number, because the mean of its divisors is an integer number (11164971181056).

Almost surely, 2^{43264263326561} is an apocalyptic number.

It is an amenable number.

43264263326561 is a deficient number, since it is larger than the sum of its proper divisors (1395621397663).

43264263326561 is a wasteful number, since it uses less digits than its factorization.

43264263326561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395621397662.

The product of its digits is 22394880, while the sum is 53.

The spelling of 43264263326561 in words is "forty-three trillion, two hundred sixty-four billion, two hundred sixty-three million, three hundred twenty-six thousand, five hundred sixty-one".