51553385494 has 8 divisors (see below), whose sum is σ = 83278545840. Its totient is φ = 23793870216.

The previous prime is 51553385473. The next prime is 51553385509. The reversal of 51553385494 is 49458335515.

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

It is a congruent number.

It is an unprimeable number.

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, 991411234 + ... + 991411285.

It is an arithmetic number, because the mean of its divisors is an integer number (10409818230).

Almost surely, 2^51553385494 is an apocalyptic number.

51553385494 is a deficient number, since it is larger than the sum of its proper divisors (31725160346).

51553385494 is a wasteful number, since it uses less digits than its factorization.

51553385494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982822534.

The product of its digits is 6480000, while the sum is 52.

The spelling of 51553385494 in words is "fifty-one billion, five hundred fifty-three million, three hundred eighty-five thousand, four hundred ninety-four".