51732977749 has 2 divisors, whose sum is σ = 51732977750. Its totient is φ = 51732977748.

The previous prime is 51732977743. The next prime is 51732977843. The reversal of 51732977749 is 94777923715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50380944849 + 1352032900 = 224457^2 + 36770^2 .

It is a cyclic number.

It is not a de Polignac number, because 51732977749 - 2³ = 51732977741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51732977741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25866488874 + 25866488875.

It is an arithmetic number, because the mean of its divisors is an integer number (25866488875).

Almost surely, 2^51732977749 is an apocalyptic number.

It is an amenable number.

51732977749 is a deficient number, since it is larger than the sum of its proper divisors (1).

51732977749 is an equidigital number, since it uses as much as digits as its factorization.

51732977749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23337720, while the sum is 61.

The spelling of 51732977749 in words is "fifty-one billion, seven hundred thirty-two million, nine hundred seventy-seven thousand, seven hundred forty-nine".