51980779470 has 128 divisors (see below), whose sum is σ = 138288384000. Its totient is φ = 12437934080.

The previous prime is 51980779463. The next prime is 51980779471. The reversal of 51980779470 is 7497708915.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51980779470.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51980779471) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3640906 + ... + 3655154.

It is an arithmetic number, because the mean of its divisors is an integer number (1080378000).

Almost surely, 2^51980779470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51980779470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69144192000).

51980779470 is an abundant number, since it is smaller than the sum of its proper divisors (86307604530).

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

51980779470 is a wasteful number, since it uses less digits than its factorization.

51980779470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14610.

The product of its (nonzero) digits is 4445280, while the sum is 57.

The spelling of 51980779470 in words is "fifty-one billion, nine hundred eighty million, seven hundred seventy-nine thousand, four hundred seventy".