51909919592309 has 8 divisors (see below), whose sum is σ = 53701371988320. Its totient is φ = 50118564207600.

The previous prime is 51909919592233. The next prime is 51909919592357. The reversal of 51909919592309 is 90329591990915.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51909919592309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51909915592309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23163347 + ... + 25305344.

It is an arithmetic number, because the mean of its divisors is an integer number (6712671498540).

Almost surely, 2^{51909919592309} is an apocalyptic number.

It is an amenable number.

51909919592309 is a deficient number, since it is larger than the sum of its proper divisors (1791452396011).

51909919592309 is a wasteful number, since it uses less digits than its factorization.

51909919592309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48505651.

The product of its (nonzero) digits is 79716150, while the sum is 71.

The spelling of 51909919592309 in words is "fifty-one trillion, nine hundred nine billion, nine hundred nineteen million, five hundred ninety-two thousand, three hundred nine".