51913318398 has 32 divisors (see below), whose sum is σ = 104480893440. Its totient is φ = 17195461920.

The previous prime is 51913318397. The next prime is 51913318409. The reversal of 51913318398 is 89381331915.

It is a self number, because there is not a number n which added to its sum of digits gives 51913318398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51913318397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4423983 + ... + 4435701.

It is an arithmetic number, because the mean of its divisors is an integer number (3265027920).

Almost surely, 2^51913318398 is an apocalyptic number.

51913318398 is an abundant number, since it is smaller than the sum of its proper divisors (52567575042).

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

51913318398 is a wasteful number, since it uses less digits than its factorization.

51913318398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16312.

The product of its digits is 699840, while the sum is 51.

The spelling of 51913318398 in words is "fifty-one billion, nine hundred thirteen million, three hundred eighteen thousand, three hundred ninety-eight".