513511443953 has 2 divisors, whose sum is σ = 513511443954. Its totient is φ = 513511443952.

The previous prime is 513511443947. The next prime is 513511444057. The reversal of 513511443953 is 359344115315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 476690823184 + 36820620769 = 690428^2 + 191887^2 .

It is a cyclic number.

It is not a de Polignac number, because 513511443953 - 2³⁴ = 496331574769 is a prime.

It is not a weakly prime, because it can be changed into another prime (513511443253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256755721976 + 256755721977.

It is an arithmetic number, because the mean of its divisors is an integer number (256755721977).

Almost surely, 2^513511443953 is an apocalyptic number.

It is an amenable number.

513511443953 is a deficient number, since it is larger than the sum of its proper divisors (1).

513511443953 is an equidigital number, since it uses as much as digits as its factorization.

513511443953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486000, while the sum is 44.

The spelling of 513511443953 in words is "five hundred thirteen billion, five hundred eleven million, four hundred forty-three thousand, nine hundred fifty-three".