51377389680 has 80 divisors (see below), whose sum is σ = 160223745024. Its totient is φ = 13618586880.

The previous prime is 51377389639. The next prime is 51377389703. The reversal of 51377389680 is 8698377315.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 51377389680.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 600856 + ... + 681015.

Almost surely, 2^51377389680 is an apocalyptic number.

It is an amenable number.

51377389680 is an abundant number, since it is smaller than the sum of its proper divisors (108846355344).

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

51377389680 is a wasteful number, since it uses less digits than its factorization.

51377389680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282054 (or 1282048 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 51377389680 in words is "fifty-one billion, three hundred seventy-seven million, three hundred eighty-nine thousand, six hundred eighty".