51616326205500 has 384 divisors, whose sum is σ = 179712957505536. Its totient is φ = 11265357312000.

The previous prime is 51616326205397. The next prime is 51616326205517. The reversal of 51616326205500 is 550262361615.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 18957984 + ... + 21509016.

It is an arithmetic number, because the mean of its divisors is an integer number (468002493504).

Almost surely, 2^{51616326205500} is an apocalyptic number.

51616326205500 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 51616326205500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89856478752768).

51616326205500 is an abundant number, since it is smaller than the sum of its proper divisors (128096631300036).

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

51616326205500 is a wasteful number, since it uses less digits than its factorization.

51616326205500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551150 (or 2551138 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 42.

The spelling of 51616326205500 in words is "fifty-one trillion, six hundred sixteen billion, three hundred twenty-six million, two hundred five thousand, five hundred".