51398943455 has 8 divisors (see below), whose sum is σ = 62314595952. Its totient is φ = 40695245568.

The previous prime is 51398943373. The next prime is 51398943461. The reversal of 51398943455 is 55434989315.

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-51398943455 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51398943455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52988117 + ... + 52989086.

It is an arithmetic number, because the mean of its divisors is an integer number (7789324494).

Almost surely, 2^51398943455 is an apocalyptic number.

51398943455 is a deficient number, since it is larger than the sum of its proper divisors (10915652497).

51398943455 is a wasteful number, since it uses less digits than its factorization.

51398943455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105977305.

The product of its digits is 11664000, while the sum is 56.

The spelling of 51398943455 in words is "fifty-one billion, three hundred ninety-eight million, nine hundred forty-three thousand, four hundred fifty-five".