51553385493 has 4 divisors (see below), whose sum is σ = 68737847328. Its totient is φ = 34368923660.

The previous prime is 51553385473. The next prime is 51553385509. The reversal of 51553385493 is 39458335515.

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 not a de Polignac number, because 51553385493 - 2⁵ = 51553385461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51553385413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8592230913 + ... + 8592230918.

It is an arithmetic number, because the mean of its divisors is an integer number (17184461832).

Almost surely, 2^51553385493 is an apocalyptic number.

It is an amenable number.

51553385493 is a deficient number, since it is larger than the sum of its proper divisors (17184461835).

51553385493 is a wasteful number, since it uses less digits than its factorization.

51553385493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17184461834.

The product of its digits is 4860000, while the sum is 51.

The spelling of 51553385493 in words is "fifty-one billion, five hundred fifty-three million, three hundred eighty-five thousand, four hundred ninety-three".