51369686448 has 80 divisors (see below), whose sum is σ = 136697664480. Its totient is φ = 16610807808.

The previous prime is 51369686383. The next prime is 51369686497. The reversal of 51369686448 is 84468696315.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51369686391 and 51369686400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555598 + ... + 641426.

It is an arithmetic number, because the mean of its divisors is an integer number (1708720806).

Almost surely, 2^51369686448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51369686448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68348832240).

51369686448 is an abundant number, since it is smaller than the sum of its proper divisors (85327978032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51369686448 is a wasteful number, since it uses less digits than its factorization.

51369686448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86214 (or 86208 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 60.

The spelling of 51369686448 in words is "fifty-one billion, three hundred sixty-nine million, six hundred eighty-six thousand, four hundred forty-eight".