55609789536 has 432 divisors, whose sum is σ = 189066150000. Its totient is φ = 15453075456.

The previous prime is 55609789523. The next prime is 55609789591. The reversal of 55609789536 is 63598790655.

55609789536 is a `hidden beast` number, since 5 + 5 + 6 + 0 + 97 + 8 + 9 + 536 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 111442215 + ... + 111442713.

It is an arithmetic number, because the mean of its divisors is an integer number (437653125).

Almost surely, 2^55609789536 is an apocalyptic number.

55609789536 is a gapful number since it is divisible by the number (56) 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 55609789536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94533075000).

55609789536 is an abundant number, since it is smaller than the sum of its proper divisors (133456360464).

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

55609789536 is a wasteful number, since it uses less digits than its factorization.

55609789536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 713 counting only the distinct ones).

The product of its (nonzero) digits is 61236000, while the sum is 63.

The spelling of 55609789536 in words is "fifty-five billion, six hundred nine million, seven hundred eighty-nine thousand, five hundred thirty-six".