511423563623573 has 2 divisors, whose sum is σ = 511423563623574. Its totient is φ = 511423563623572.

The previous prime is 511423563623549. The next prime is 511423563623603. The reversal of 511423563623573 is 375326365324115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 507508891649764 + 3914671973809 = 22527958^2 + 1978553^2 .

It is a cyclic number.

It is not a de Polignac number, because 511423563623573 - 2²⁴ = 511423546846357 is a prime.

It is a super-2 number, since 2×511423563623573² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511423563623773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255711781811786 + 255711781811787.

It is an arithmetic number, because the mean of its divisors is an integer number (255711781811787).

Almost surely, 2^{511423563623573} is an apocalyptic number.

It is an amenable number.

511423563623573 is a deficient number, since it is larger than the sum of its proper divisors (1).

511423563623573 is an equidigital number, since it uses as much as digits as its factorization.

511423563623573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824000, while the sum is 56.

The spelling of 511423563623573 in words is "five hundred eleven trillion, four hundred twenty-three billion, five hundred sixty-three million, six hundred twenty-three thousand, five hundred seventy-three".