51604135202 has 8 divisors (see below), whose sum is σ = 80075382300. Its totient is φ = 24912341104.

The previous prime is 51604135199. The next prime is 51604135207. The reversal of 51604135202 is 20253140615.

It can be written as a sum of positive squares in 2 ways, for example, as 46954122721 + 4650012481 = 216689^2 + 68191^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (51604135207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444863177 + ... + 444863292.

Almost surely, 2^51604135202 is an apocalyptic number.

51604135202 is a deficient number, since it is larger than the sum of its proper divisors (28471247098).

51604135202 is a wasteful number, since it uses less digits than its factorization.

51604135202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889726500.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 51604135202 its reverse (20253140615), we get a palindrome (71857275817).

It can be divided in two parts, 5160413 and 5202, that added together give a palindrome (5165615).

The spelling of 51604135202 in words is "fifty-one billion, six hundred four million, one hundred thirty-five thousand, two hundred two".