51044579749 has 2 divisors, whose sum is σ = 51044579750. Its totient is φ = 51044579748.

The previous prime is 51044579741. The next prime is 51044579801. The reversal of 51044579749 is 94797544015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43657177249 + 7387402500 = 208943^2 + 85950^2 .

It is a cyclic number.

It is not a de Polignac number, because 51044579749 - 2³ = 51044579741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51044579749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51044579741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25522289874 + 25522289875.

It is an arithmetic number, because the mean of its divisors is an integer number (25522289875).

Almost surely, 2^51044579749 is an apocalyptic number.

It is an amenable number.

51044579749 is a deficient number, since it is larger than the sum of its proper divisors (1).

51044579749 is an equidigital number, since it uses as much as digits as its factorization.

51044579749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 51044579749 in words is "fifty-one billion, forty-four million, five hundred seventy-nine thousand, seven hundred forty-nine".