51383637401 has 2 divisors, whose sum is σ = 51383637402. Its totient is φ = 51383637400.

The previous prime is 51383637391. The next prime is 51383637467. The reversal of 51383637401 is 10473638315.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47890945600 + 3492691801 = 218840^2 + 59099^2 .

It is a cyclic number.

It is not a de Polignac number, because 51383637401 - 2¹⁰ = 51383636377 is a prime.

It is not a weakly prime, because it can be changed into another prime (51383636401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25691818700 + 25691818701.

It is an arithmetic number, because the mean of its divisors is an integer number (25691818701).

Almost surely, 2^51383637401 is an apocalyptic number.

It is an amenable number.

51383637401 is a deficient number, since it is larger than the sum of its proper divisors (1).

51383637401 is an equidigital number, since it uses as much as digits as its factorization.

51383637401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 51383637401 in words is "fifty-one billion, three hundred eighty-three million, six hundred thirty-seven thousand, four hundred one".