51300799920 has 240 divisors, whose sum is σ = 175454490432. Its totient is φ = 13429463040.

The previous prime is 51300799873. The next prime is 51300799961. The reversal of 51300799920 is 2999700315.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

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

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 47 ways as a sum of consecutive naturals, for example, 33246669 + ... + 33248211.

Almost surely, 2^51300799920 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 51300799920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87727245216).

51300799920 is an abundant number, since it is smaller than the sum of its proper divisors (124153690512).

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

51300799920 is a wasteful number, since it uses less digits than its factorization.

51300799920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380 (or 2371 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The spelling of 51300799920 in words is "fifty-one billion, three hundred million, seven hundred ninety-nine thousand, nine hundred twenty".