105664536745523 has 4 divisors (see below), whose sum is σ = 120759470566320. Its totient is φ = 90569602924728.

The previous prime is 105664536745487. The next prime is 105664536745567. The reversal of 105664536745523 is 325547635466501.

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-105664536745523 is a prime.

It is a super-2 number, since 2×105664536745523² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105664536145523) 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, 7547466910388 + ... + 7547466910401.

It is an arithmetic number, because the mean of its divisors is an integer number (30189867641580).

Almost surely, 2^{105664536745523} is an apocalyptic number.

105664536745523 is a deficient number, since it is larger than the sum of its proper divisors (15094933820797).

105664536745523 is an equidigital number, since it uses as much as digits as its factorization.

105664536745523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15094933820796.

The product of its (nonzero) digits is 272160000, while the sum is 62.

The spelling of 105664536745523 in words is "one hundred five trillion, six hundred sixty-four billion, five hundred thirty-six million, seven hundred forty-five thousand, five hundred twenty-three".