520240523965 has 8 divisors (see below), whose sum is σ = 626510298168. Its totient is φ = 414711306240.

The previous prime is 520240523953. The next prime is 520240523981. The reversal of 520240523965 is 569325042025.

It can be written as a sum of positive squares in 4 ways, for example, as 253495131289 + 266745392676 = 503483^2 + 516474^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 520240523965 - 2¹⁹ = 520239999677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185137572 + ... + 185140381.

It is an arithmetic number, because the mean of its divisors is an integer number (78313787271).

Almost surely, 2^520240523965 is an apocalyptic number.

It is an amenable number.

520240523965 is a deficient number, since it is larger than the sum of its proper divisors (106269774203).

520240523965 is a wasteful number, since it uses less digits than its factorization.

520240523965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370278239.

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 520240523965 in words is "five hundred twenty billion, two hundred forty million, five hundred twenty-three thousand, nine hundred sixty-five".