520948669837 has 4 divisors (see below), whose sum is σ = 520986645280. Its totient is φ = 520910694396.

The previous prime is 520948669807. The next prime is 520948669853. The reversal of 520948669837 is 738966849025.

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 a cyclic number.

It is not a de Polignac number, because 520948669837 - 2²³ = 520940281229 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 (520948669807) 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, 18967137 + ... + 18994582.

It is an arithmetic number, because the mean of its divisors is an integer number (130246661320).

Almost surely, 2^520948669837 is an apocalyptic number.

It is an amenable number.

520948669837 is a deficient number, since it is larger than the sum of its proper divisors (37975443).

520948669837 is a wasteful number, since it uses less digits than its factorization.

520948669837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37975442.

The product of its (nonzero) digits is 156764160, while the sum is 67.

The spelling of 520948669837 in words is "five hundred twenty billion, nine hundred forty-eight million, six hundred sixty-nine thousand, eight hundred thirty-seven".