520129312453 has 4 divisors (see below), whose sum is σ = 550725154380. Its totient is φ = 489533470528.

The previous prime is 520129312441. The next prime is 520129312463. The reversal of 520129312453 is 354213921025.

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 172575438084 + 347553874369 = 415422^2 + 589537^2 .

It is a cyclic number.

It is not a de Polignac number, because 520129312453 - 2⁵ = 520129312421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520129312463) 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, 15297920938 + ... + 15297920971.

It is an arithmetic number, because the mean of its divisors is an integer number (137681288595).

Almost surely, 2^520129312453 is an apocalyptic number.

It is an amenable number.

520129312453 is a deficient number, since it is larger than the sum of its proper divisors (30595841927).

520129312453 is a wasteful number, since it uses less digits than its factorization.

520129312453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30595841926.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 520129312453 in words is "five hundred twenty billion, one hundred twenty-nine million, three hundred twelve thousand, four hundred fifty-three".