51611733320 has 96 divisors (see below), whose sum is σ = 136796169600. Its totient is φ = 17471405952.

The previous prime is 51611733311. The next prime is 51611733353. The reversal of 51611733320 is 2333711615.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11822 + ... + 321501.

It is an arithmetic number, because the mean of its divisors is an integer number (1424960100).

Almost surely, 2^51611733320 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 51611733320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68398084800).

51611733320 is an abundant number, since it is smaller than the sum of its proper divisors (85184436280).

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

51611733320 is a wasteful number, since it uses less digits than its factorization.

51611733320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333427 (or 333416 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 32.

The spelling of 51611733320 in words is "fifty-one billion, six hundred eleven million, seven hundred thirty-three thousand, three hundred twenty".