51982440949 has 2 divisors, whose sum is σ = 51982440950. Its totient is φ = 51982440948.

The previous prime is 51982440919. The next prime is 51982440953. The reversal of 51982440949 is 94904428915.

51982440949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39798255025 + 12184185924 = 199495^2 + 110382^2 .

It is a cyclic number.

It is not a de Polignac number, because 51982440949 - 2¹³ = 51982432757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51982440949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51982440919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25991220474 + 25991220475.

It is an arithmetic number, because the mean of its divisors is an integer number (25991220475).

Almost surely, 2^51982440949 is an apocalyptic number.

It is an amenable number.

51982440949 is a deficient number, since it is larger than the sum of its proper divisors (1).

51982440949 is an equidigital number, since it uses as much as digits as its factorization.

51982440949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 51982440949 in words is "fifty-one billion, nine hundred eighty-two million, four hundred forty thousand, nine hundred forty-nine".