51011346511 has 2 divisors, whose sum is σ = 51011346512. Its totient is φ = 51011346510.

The previous prime is 51011346493. The next prime is 51011346541. The reversal of 51011346511 is 11564311015.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51011346511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51011346511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51011346541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25505673255 + 25505673256.

It is an arithmetic number, because the mean of its divisors is an integer number (25505673256).

Almost surely, 2^51011346511 is an apocalyptic number.

51011346511 is a deficient number, since it is larger than the sum of its proper divisors (1).

51011346511 is an equidigital number, since it uses as much as digits as its factorization.

51011346511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 28.

Adding to 51011346511 its reverse (11564311015), we get a palindrome (62575657526).

The spelling of 51011346511 in words is "fifty-one billion, eleven million, three hundred forty-six thousand, five hundred eleven".