11756478873701 has 4 divisors (see below), whose sum is σ = 11756487745932. Its totient is φ = 11756470001472.

The previous prime is 11756478873691. The next prime is 11756478873709. The reversal of 11756478873701 is 10737887465711.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8629487884801 + 3126990988900 = 2937599^2 + 1768330^2 .

It is a cyclic number.

It is not a de Polignac number, because 11756478873701 - 2¹⁸ = 11756478611557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11756478873709) 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, 2004020 + ... + 5246813.

It is an arithmetic number, because the mean of its divisors is an integer number (2939121936483).

Almost surely, 2^{11756478873701} is an apocalyptic number.

It is an amenable number.

11756478873701 is a deficient number, since it is larger than the sum of its proper divisors (8872231).

11756478873701 is an equidigital number, since it uses as much as digits as its factorization.

11756478873701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8872230.

The product of its (nonzero) digits is 55319040, while the sum is 65.

The spelling of 11756478873701 in words is "eleven trillion, seven hundred fifty-six billion, four hundred seventy-eight million, eight hundred seventy-three thousand, seven hundred one".