51612747413 has 2 divisors, whose sum is σ = 51612747414. Its totient is φ = 51612747412.

The previous prime is 51612747383. The next prime is 51612747449. The reversal of 51612747413 is 31474721615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50356257604 + 1256489809 = 224402^2 + 35447^2 .

It is a cyclic number.

It is not a de Polignac number, because 51612747413 - 2⁶ = 51612747349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51612747463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25806373706 + 25806373707.

It is an arithmetic number, because the mean of its divisors is an integer number (25806373707).

Almost surely, 2^51612747413 is an apocalyptic number.

It is an amenable number.

51612747413 is a deficient number, since it is larger than the sum of its proper divisors (1).

51612747413 is an equidigital number, since it uses as much as digits as its factorization.

51612747413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 41.

The spelling of 51612747413 in words is "fifty-one billion, six hundred twelve million, seven hundred forty-seven thousand, four hundred thirteen".