51323145505 has 8 divisors (see below), whose sum is σ = 61711200000. Its totient is φ = 40976232816.

The previous prime is 51323145479. The next prime is 51323145539. The reversal of 51323145505 is 50554132315.

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

It is a cyclic number.

It is not a de Polignac number, because 51323145505 - 2²⁹ = 50786274593 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10282705 + ... + 10287694.

It is an arithmetic number, because the mean of its divisors is an integer number (7713900000).

Almost surely, 2^51323145505 is an apocalyptic number.

It is an amenable number.

51323145505 is a deficient number, since it is larger than the sum of its proper divisors (10388054495).

51323145505 is a wasteful number, since it uses less digits than its factorization.

51323145505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20570903.

The product of its (nonzero) digits is 45000, while the sum is 34.

The spelling of 51323145505 in words is "fifty-one billion, three hundred twenty-three million, one hundred forty-five thousand, five hundred five".