51616838500 has 48 divisors (see below), whose sum is σ = 112846930560. Its totient is φ = 20625535200.

The previous prime is 51616838479. The next prime is 51616838513. The reversal of 51616838500 is 583861615.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438991 + ... + 544009.

It is an arithmetic number, because the mean of its divisors is an integer number (2350977720).

Almost surely, 2^51616838500 is an apocalyptic number.

51616838500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51616838500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56423465280).

51616838500 is an abundant number, since it is smaller than the sum of its proper divisors (61230092060).

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

51616838500 is a wasteful number, since it uses less digits than its factorization.

51616838500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106021 (or 106009 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 51616838500 in words is "fifty-one billion, six hundred sixteen million, eight hundred thirty-eight thousand, five hundred".