520252377985 has 32 divisors (see below), whose sum is σ = 641947680000. Its totient is φ = 404612038656.

The previous prime is 520252377947. The next prime is 520252377989. The reversal of 520252377985 is 589773252025.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520252377985 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520252377989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14950036 + ... + 14984794.

It is an arithmetic number, because the mean of its divisors is an integer number (20060865000).

Almost surely, 2^520252377985 is an apocalyptic number.

It is an amenable number.

520252377985 is a deficient number, since it is larger than the sum of its proper divisors (121695302015).

520252377985 is a wasteful number, since it uses less digits than its factorization.

520252377985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35385.

The product of its (nonzero) digits is 10584000, while the sum is 55.

The spelling of 520252377985 in words is "five hundred twenty billion, two hundred fifty-two million, three hundred seventy-seven thousand, nine hundred eighty-five".