51634923161 has 2 divisors, whose sum is σ = 51634923162. Its totient is φ = 51634923160.

The previous prime is 51634923143. The next prime is 51634923227. The reversal of 51634923161 is 16132943615.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46207801600 + 5427121561 = 214960^2 + 73669^2 .

It is a cyclic number.

It is not a de Polignac number, because 51634923161 - 2²² = 51630728857 is a prime.

It is not a weakly prime, because it can be changed into another prime (51634923101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25817461580 + 25817461581.

It is an arithmetic number, because the mean of its divisors is an integer number (25817461581).

Almost surely, 2^51634923161 is an apocalyptic number.

It is an amenable number.

51634923161 is a deficient number, since it is larger than the sum of its proper divisors (1).

51634923161 is an equidigital number, since it uses as much as digits as its factorization.

51634923161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The spelling of 51634923161 in words is "fifty-one billion, six hundred thirty-four million, nine hundred twenty-three thousand, one hundred sixty-one".