51612512687 has 2 divisors, whose sum is σ = 51612512688. Its totient is φ = 51612512686.

The previous prime is 51612512659. The next prime is 51612512723. The reversal of 51612512687 is 78621521615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51612512687 - 2¹⁴ = 51612496303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51612514687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25806256343 + 25806256344.

It is an arithmetic number, because the mean of its divisors is an integer number (25806256344).

Almost surely, 2^51612512687 is an apocalyptic number.

51612512687 is a deficient number, since it is larger than the sum of its proper divisors (1).

51612512687 is an equidigital number, since it uses as much as digits as its factorization.

51612512687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 44.

The spelling of 51612512687 in words is "fifty-one billion, six hundred twelve million, five hundred twelve thousand, six hundred eighty-seven".