13077506421523 has 4 divisors (see below), whose sum is σ = 13846771505160. Its totient is φ = 12308241337888.

The previous prime is 13077506421517. The next prime is 13077506421601. The reversal of 13077506421523 is 32512460577031.

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

It is a cyclic number.

It is not a de Polignac number, because 13077506421523 - 2²¹ = 13077504324371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13077506421503) 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, 384632541793 + ... + 384632541826.

It is an arithmetic number, because the mean of its divisors is an integer number (3461692876290).

Almost surely, 2^{13077506421523} is an apocalyptic number.

13077506421523 is a deficient number, since it is larger than the sum of its proper divisors (769265083637).

13077506421523 is an equidigital number, since it uses as much as digits as its factorization.

13077506421523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769265083636.

The product of its (nonzero) digits is 1058400, while the sum is 46.

Adding to 13077506421523 its reverse (32512460577031), we get a palindrome (45589966998554).

The spelling of 13077506421523 in words is "thirteen trillion, seventy-seven billion, five hundred six million, four hundred twenty-one thousand, five hundred twenty-three".