520129154969 has 2 divisors, whose sum is σ = 520129154970. Its totient is φ = 520129154968.

The previous prime is 520129154953. The next prime is 520129154981. The reversal of 520129154969 is 969451921025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 515972129344 + 4157025625 = 718312^2 + 64475^2 .

It is a cyclic number.

It is not a de Polignac number, because 520129154969 - 2⁴ = 520129154953 is a prime.

It is a super-2 number, since 2×520129154969² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 520129154969.

It is not a weakly prime, because it can be changed into another prime (520129154269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260064577484 + 260064577485.

It is an arithmetic number, because the mean of its divisors is an integer number (260064577485).

Almost surely, 2^520129154969 is an apocalyptic number.

It is an amenable number.

520129154969 is a deficient number, since it is larger than the sum of its proper divisors (1).

520129154969 is an equidigital number, since it uses as much as digits as its factorization.

520129154969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1749600, while the sum is 53.

The spelling of 520129154969 in words is "five hundred twenty billion, one hundred twenty-nine million, one hundred fifty-four thousand, nine hundred sixty-nine".