51622686720 has 1248 divisors, whose sum is σ = 216387085824. Its totient is φ = 11678515200.

The previous prime is 51622686719. The next prime is 51622686751. The reversal of 51622686720 is 2768622615.

51622686720 is a `hidden beast` number, since 516 + 2 + 2 + 68 + 6 + 72 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1259089900 + ... + 1259089940.

It is an arithmetic number, because the mean of its divisors is an integer number (173387088).

Almost surely, 2^51622686720 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 51622686720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108193542912).

51622686720 is an abundant number, since it is smaller than the sum of its proper divisors (164764399104).

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

51622686720 is a wasteful number, since it uses less digits than its factorization.

51622686720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 51622686720 in words is "fifty-one billion, six hundred twenty-two million, six hundred eighty-six thousand, seven hundred twenty".