51860669437 has 2 divisors, whose sum is σ = 51860669438. Its totient is φ = 51860669436.

The previous prime is 51860669431. The next prime is 51860669479. The reversal of 51860669437 is 73496606815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48109596921 + 3751072516 = 219339^2 + 61246^2 .

It is a cyclic number.

It is not a de Polignac number, because 51860669437 - 2³ = 51860669429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51860669431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25930334718 + 25930334719.

It is an arithmetic number, because the mean of its divisors is an integer number (25930334719).

Almost surely, 2^51860669437 is an apocalyptic number.

It is an amenable number.

51860669437 is a deficient number, since it is larger than the sum of its proper divisors (1).

51860669437 is an equidigital number, since it uses as much as digits as its factorization.

51860669437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 51860669437 in words is "fifty-one billion, eight hundred sixty million, six hundred sixty-nine thousand, four hundred thirty-seven".