51207051667 has 2 divisors, whose sum is σ = 51207051668. Its totient is φ = 51207051666.

The previous prime is 51207051647. The next prime is 51207051671. The reversal of 51207051667 is 76615070215.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51207051667 - 2²⁷ = 51072833939 is a prime.

It is not a weakly prime, because it can be changed into another prime (51207051647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25603525833 + 25603525834.

It is an arithmetic number, because the mean of its divisors is an integer number (25603525834).

Almost surely, 2^51207051667 is an apocalyptic number.

51207051667 is a deficient number, since it is larger than the sum of its proper divisors (1).

51207051667 is an equidigital number, since it uses as much as digits as its factorization.

51207051667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 51207051667 in words is "fifty-one billion, two hundred seven million, fifty-one thousand, six hundred sixty-seven".