18396536562757 has 4 divisors (see below), whose sum is σ = 18397480526860. Its totient is φ = 18395592598656.

The previous prime is 18396536562749. The next prime is 18396536562763. The reversal of 18396536562757 is 75726563569381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119936849761 + 18276599712996 = 346319^2 + 4275114^2 .

It is a cyclic number.

It is not a de Polignac number, because 18396536562757 - 2³ = 18396536562749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18396536562757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18396536562737) 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, 471952818 + ... + 471991795.

It is an arithmetic number, because the mean of its divisors is an integer number (4599370131715).

Almost surely, 2^{18396536562757} is an apocalyptic number.

It is an amenable number.

18396536562757 is a deficient number, since it is larger than the sum of its proper divisors (943964103).

18396536562757 is an equidigital number, since it uses as much as digits as its factorization.

18396536562757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943964102.

The product of its digits is 1714608000, while the sum is 73.

The spelling of 18396536562757 in words is "eighteen trillion, three hundred ninety-six billion, five hundred thirty-six million, five hundred sixty-two thousand, seven hundred fifty-seven".