523656646223401 has 4 divisors (see below), whose sum is σ = 523733282648532. Its totient is φ = 523580009798272.

The previous prime is 523656646223377. The next prime is 523656646223453. The reversal of 523656646223401 is 104322646656325.

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 312203314364176 + 211453331859225 = 17669276^2 + 14541435^2 .

It is a cyclic number.

It is not a de Polignac number, because 523656646223401 - 2⁹ = 523656646222889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523656646224401) 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, 38318202316 + ... + 38318215981.

It is an arithmetic number, because the mean of its divisors is an integer number (130933320662133).

Almost surely, 2^{523656646223401} is an apocalyptic number.

It is an amenable number.

523656646223401 is a deficient number, since it is larger than the sum of its proper divisors (76636425131).

523656646223401 is an equidigital number, since it uses as much as digits as its factorization.

523656646223401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76636425130.

The product of its (nonzero) digits is 37324800, while the sum is 55.

The spelling of 523656646223401 in words is "five hundred twenty-three trillion, six hundred fifty-six billion, six hundred forty-six million, two hundred twenty-three thousand, four hundred one".