51383610553 has 4 divisors (see below), whose sum is σ = 56054847888. Its totient is φ = 46712373220.

The previous prime is 51383610517. The next prime is 51383610569. The reversal of 51383610553 is 35501638315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51383610553 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51383610503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2335618651 + ... + 2335618672.

It is an arithmetic number, because the mean of its divisors is an integer number (14013711972).

Almost surely, 2^51383610553 is an apocalyptic number.

It is an amenable number.

51383610553 is a deficient number, since it is larger than the sum of its proper divisors (4671237335).

51383610553 is a wasteful number, since it uses less digits than its factorization.

51383610553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671237334.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 51383610553 in words is "fifty-one billion, three hundred eighty-three million, six hundred ten thousand, five hundred fifty-three".