51906000049 has 2 divisors, whose sum is σ = 51906000050. Its totient is φ = 51906000048.

The previous prime is 51906000037. The next prime is 51906000077. The reversal of 51906000049 is 94000060915.

51906000049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28002675600 + 23903324449 = 167340^2 + 154607^2 .

It is a cyclic number.

It is not a de Polignac number, because 51906000049 - 2¹⁹ = 51905475761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51905999978 and 51906000023.

It is not a weakly prime, because it can be changed into another prime (51906000149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25953000024 + 25953000025.

It is an arithmetic number, because the mean of its divisors is an integer number (25953000025).

Almost surely, 2^51906000049 is an apocalyptic number.

It is an amenable number.

51906000049 is a deficient number, since it is larger than the sum of its proper divisors (1).

51906000049 is an equidigital number, since it uses as much as digits as its factorization.

51906000049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The spelling of 51906000049 in words is "fifty-one billion, nine hundred six million, forty-nine", and thus it is an aban number.