520522665640457 has 4 divisors (see below), whose sum is σ = 523247915198976. Its totient is φ = 517797416081940.

The previous prime is 520522665640421. The next prime is 520522665640493. The reversal of 520522665640457 is 754046566225025.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (520522665640421) and next prime (520522665640493).

It is a cyclic number.

It is not a de Polignac number, because 520522665640457 - 2¹⁰ = 520522665639433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520522665640396 and 520522665640405.

It is not an unprimeable number, because it can be changed into a prime (520522665643457) 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, 1362624778973 + ... + 1362624779354.

It is an arithmetic number, because the mean of its divisors is an integer number (130811978799744).

Almost surely, 2^{520522665640457} is an apocalyptic number.

It is an amenable number.

520522665640457 is a deficient number, since it is larger than the sum of its proper divisors (2725249558519).

520522665640457 is a wasteful number, since it uses less digits than its factorization.

520522665640457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725249558518.

The product of its (nonzero) digits is 120960000, while the sum is 59.

The spelling of 520522665640457 in words is "five hundred twenty trillion, five hundred twenty-two billion, six hundred sixty-five million, six hundred forty thousand, four hundred fifty-seven".