51555453321204 has 108 divisors (see below), whose sum is σ = 158188782364704. Its totient is φ = 14089689095328.

The previous prime is 51555453321187. The next prime is 51555453321221. The reversal of 51555453321204 is 40212335455515.

51555453321204 is a `hidden beast` number, since 5 + 1 + 5 + 554 + 53 + 3 + 21 + 20 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (51555453321187) and next prime (51555453321221).

It is a self number, because there is not a number n which added to its sum of digits gives 51555453321204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 635316982 + ... + 635398125.

Almost surely, 2^{51555453321204} is an apocalyptic number.

It is an amenable number.

51555453321204 is an abundant number, since it is smaller than the sum of its proper divisors (106633329043500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51555453321204 is a wasteful number, since it uses less digits than its factorization.

51555453321204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270715154 (or 1270715142 counting only the distinct ones).

The product of its (nonzero) digits is 1800000, while the sum is 45.

Adding to 51555453321204 its reverse (40212335455515), we get a palindrome (91767788776719).

The spelling of 51555453321204 in words is "fifty-one trillion, five hundred fifty-five billion, four hundred fifty-three million, three hundred twenty-one thousand, two hundred four".