51637904057 has 2 divisors, whose sum is σ = 51637904058. Its totient is φ = 51637904056.

The previous prime is 51637904011. The next prime is 51637904083. The reversal of 51637904057 is 75040973615.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46680195136 + 4957708921 = 216056^2 + 70411^2 .

It is a cyclic number.

It is not a de Polignac number, because 51637904057 - 2¹⁰ = 51637903033 is a prime.

It is not a weakly prime, because it can be changed into another prime (51637906057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25818952028 + 25818952029.

It is an arithmetic number, because the mean of its divisors is an integer number (25818952029).

Almost surely, 2^51637904057 is an apocalyptic number.

It is an amenable number.

51637904057 is a deficient number, since it is larger than the sum of its proper divisors (1).

51637904057 is an equidigital number, since it uses as much as digits as its factorization.

51637904057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 793800, while the sum is 47.

The spelling of 51637904057 in words is "fifty-one billion, six hundred thirty-seven million, nine hundred four thousand, fifty-seven".