861735045600 has 1152 divisors, whose sum is σ = 3877086850560. Its totient is φ = 181481472000.

The previous prime is 861735045593. The next prime is 861735045623. The reversal of 861735045600 is 6540537168.

861735045600 is a `hidden beast` number, since 8 + 6 + 1 + 7 + 35 + 0 + 4 + 5 + 600 = 666.

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

It is a congruent number.

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 191 ways as a sum of consecutive naturals, for example, 52501395 + ... + 52517805.

It is an arithmetic number, because the mean of its divisors is an integer number (3365526780).

Almost surely, 2^861735045600 is an apocalyptic number.

861735045600 is a gapful number since it is divisible by the number (80) 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 861735045600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1938543425280).

861735045600 is an abundant number, since it is smaller than the sum of its proper divisors (3015351804960).

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

861735045600 is a wasteful number, since it uses less digits than its factorization.

861735045600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16481 (or 16462 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 861735045600 in words is "eight hundred sixty-one billion, seven hundred thirty-five million, forty-five thousand, six hundred".