51504711667 has 2 divisors, whose sum is σ = 51504711668. Its totient is φ = 51504711666.

The previous prime is 51504711653. The next prime is 51504711679. The reversal of 51504711667 is 76611740515.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51504711667 - 2¹⁵ = 51504678899 is a prime.

It is not a weakly prime, because it can be changed into another prime (51504711617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25752355833 + 25752355834.

It is an arithmetic number, because the mean of its divisors is an integer number (25752355834).

Almost surely, 2^51504711667 is an apocalyptic number.

51504711667 is a deficient number, since it is larger than the sum of its proper divisors (1).

51504711667 is an equidigital number, since it uses as much as digits as its factorization.

51504711667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 43.

The spelling of 51504711667 in words is "fifty-one billion, five hundred four million, seven hundred eleven thousand, six hundred sixty-seven".