51147620860 has 96 divisors (see below), whose sum is σ = 130482430848. Its totient is φ = 16440360960.

The previous prime is 51147620837. The next prime is 51147620863. The reversal of 51147620860 is 6802674115.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51147620863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 569850 + ... + 653470.

It is an arithmetic number, because the mean of its divisors is an integer number (1359191988).

Almost surely, 2^51147620860 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 51147620860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65241215424).

51147620860 is an abundant number, since it is smaller than the sum of its proper divisors (79334809988).

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

51147620860 is a wasteful number, since it uses less digits than its factorization.

51147620860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83911 (or 83909 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 51147620860 in words is "fifty-one billion, one hundred forty-seven million, six hundred twenty thousand, eight hundred sixty".