51638005371 has 16 divisors (see below), whose sum is σ = 69286694400. Its totient is φ = 34207468608.

The previous prime is 51638005283. The next prime is 51638005373. The reversal of 51638005371 is 17350083615.

It is a happy number.

It is not a de Polignac number, because 51638005371 - 2¹¹ = 51638003323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51638005373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1591650 + ... + 1623768.

It is an arithmetic number, because the mean of its divisors is an integer number (4330418400).

Almost surely, 2^51638005371 is an apocalyptic number.

51638005371 is a deficient number, since it is larger than the sum of its proper divisors (17648689029).

51638005371 is a wasteful number, since it uses less digits than its factorization.

51638005371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35498.

The product of its (nonzero) digits is 75600, while the sum is 39.

Adding to 51638005371 its reverse (17350083615), we get a palindrome (68988088986).

The spelling of 51638005371 in words is "fifty-one billion, six hundred thirty-eight million, five thousand, three hundred seventy-one".