51545654513 has 2 divisors, whose sum is σ = 51545654514. Its totient is φ = 51545654512.

The previous prime is 51545654431. The next prime is 51545654521. The reversal of 51545654513 is 31545654515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28097470129 + 23448184384 = 167623^2 + 153128^2 .

It is a cyclic number.

It is not a de Polignac number, because 51545654513 - 2¹² = 51545650417 is a prime.

It is not a weakly prime, because it can be changed into another prime (51545624513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25772827256 + 25772827257.

It is an arithmetic number, because the mean of its divisors is an integer number (25772827257).

Almost surely, 2^51545654513 is an apocalyptic number.

It is an amenable number.

51545654513 is a deficient number, since it is larger than the sum of its proper divisors (1).

51545654513 is an equidigital number, since it uses as much as digits as its factorization.

51545654513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900000, while the sum is 44.

The spelling of 51545654513 in words is "fifty-one billion, five hundred forty-five million, six hundred fifty-four thousand, five hundred thirteen".