511763843975947 has 2 divisors, whose sum is σ = 511763843975948. Its totient is φ = 511763843975946.

The previous prime is 511763843975939. The next prime is 511763843976037. The reversal of 511763843975947 is 749579348367115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 511763843975947 - 2³ = 511763843975939 is a prime.

It is a super-2 number, since 2×511763843975947² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (511763843975927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255881921987973 + 255881921987974.

It is an arithmetic number, because the mean of its divisors is an integer number (255881921987974).

Almost surely, 2^{511763843975947} is an apocalyptic number.

511763843975947 is a deficient number, since it is larger than the sum of its proper divisors (1).

511763843975947 is an equidigital number, since it uses as much as digits as its factorization.

511763843975947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800902400, while the sum is 79.

The spelling of 511763843975947 in words is "five hundred eleven trillion, seven hundred sixty-three billion, eight hundred forty-three million, nine hundred seventy-five thousand, nine hundred forty-seven".