51380428049 has 2 divisors, whose sum is σ = 51380428050. Its totient is φ = 51380428048.

The previous prime is 51380428027. The next prime is 51380428063. The reversal of 51380428049 is 94082408315.

It is a happy number.

51380428049 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., 42683560000 + 8696868049 = 206600^2 + 93257^2 .

It is a cyclic number.

It is not a de Polignac number, because 51380428049 - 2²⁸ = 51111992593 is a prime.

It is not a weakly prime, because it can be changed into another prime (51380428079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25690214024 + 25690214025.

It is an arithmetic number, because the mean of its divisors is an integer number (25690214025).

Almost surely, 2^51380428049 is an apocalyptic number.

It is an amenable number.

51380428049 is a deficient number, since it is larger than the sum of its proper divisors (1).

51380428049 is an equidigital number, since it uses as much as digits as its factorization.

51380428049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 51380428049 in words is "fifty-one billion, three hundred eighty million, four hundred twenty-eight thousand, forty-nine".