11723009036545 has 4 divisors (see below), whose sum is σ = 14067610843860. Its totient is φ = 9378407229232.

The previous prime is 11723009036539. The next prime is 11723009036551. The reversal of 11723009036545 is 54563090032711.

It is a Cunningham number, because it is equal to 3423888²+1.

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

It is an interprime number because it is at equal distance from previous prime (11723009036539) and next prime (11723009036551).

It can be written as a sum of positive squares in 2 ways, for example, as 4220279966224 + 7502729070321 = 2054332^2 + 2739111^2 .

It is a cyclic number.

It is not a de Polignac number, because 11723009036545 - 2¹⁷ = 11723008905473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11723009036495 and 11723009036504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172300903650 + ... + 1172300903659.

It is an arithmetic number, because the mean of its divisors is an integer number (3516902710965).

Almost surely, 2^{11723009036545} is an apocalyptic number.

It is an amenable number.

11723009036545 is a deficient number, since it is larger than the sum of its proper divisors (2344601807315).

11723009036545 is an equidigital number, since it uses as much as digits as its factorization.

11723009036545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344601807314.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 11723009036545 in words is "eleven trillion, seven hundred twenty-three billion, nine million, thirty-six thousand, five hundred forty-five".