511497761 has 2 divisors, whose sum is σ = 511497762. Its totient is φ = 511497760.

The previous prime is 511497743. The next prime is 511497793. The reversal of 511497761 is 167794115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 511438225 + 59536 = 22615^2 + 244^2 .

It is a cyclic number.

It is not a de Polignac number, because 511497761 - 2²² = 507303457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (511497061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255748880 + 255748881.

It is an arithmetic number, because the mean of its divisors is an integer number (255748881).

Almost surely, 2^511497761 is an apocalyptic number.

It is an amenable number.

511497761 is a deficient number, since it is larger than the sum of its proper divisors (1).

511497761 is an equidigital number, since it uses as much as digits as its factorization.

511497761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 41.

The square root of 511497761 is about 22616.3162561899. The cubic root of 511497761 is about 799.7383316089.

The spelling of 511497761 in words is "five hundred eleven million, four hundred ninety-seven thousand, seven hundred sixty-one".