51445028977 has 2 divisors, whose sum is σ = 51445028978. Its totient is φ = 51445028976.

The previous prime is 51445028927. The next prime is 51445029017. The reversal of 51445028977 is 77982054415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46349353521 + 5095675456 = 215289^2 + 71384^2 .

It is a cyclic number.

It is not a de Polignac number, because 51445028977 - 2¹¹ = 51445026929 is a prime.

It is not a weakly prime, because it can be changed into another prime (51445028927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25722514488 + 25722514489.

It is an arithmetic number, because the mean of its divisors is an integer number (25722514489).

Almost surely, 2^51445028977 is an apocalyptic number.

It is an amenable number.

51445028977 is a deficient number, since it is larger than the sum of its proper divisors (1).

51445028977 is an equidigital number, since it uses as much as digits as its factorization.

51445028977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 51445028977 in words is "fifty-one billion, four hundred forty-five million, twenty-eight thousand, nine hundred seventy-seven".