511149606281 has 2 divisors, whose sum is σ = 511149606282. Its totient is φ = 511149606280.

The previous prime is 511149606271. The next prime is 511149606307. The reversal of 511149606281 is 182606941115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 454085951881 + 57063654400 = 673859^2 + 238880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511149606281 is a prime.

It is a super-2 number, since 2×511149606281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (511149606271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255574803140 + 255574803141.

It is an arithmetic number, because the mean of its divisors is an integer number (255574803141).

Almost surely, 2^511149606281 is an apocalyptic number.

It is an amenable number.

511149606281 is a deficient number, since it is larger than the sum of its proper divisors (1).

511149606281 is an equidigital number, since it uses as much as digits as its factorization.

511149606281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 511149606281 in words is "five hundred eleven billion, one hundred forty-nine million, six hundred six thousand, two hundred eighty-one".