56121091104 has 96 divisors (see below), whose sum is σ = 158715716544. Its totient is φ = 17260876800.

The previous prime is 56121091093. The next prime is 56121091157. The reversal of 56121091104 is 40119012165.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3550162 + ... + 3565934.

It is an arithmetic number, because the mean of its divisors is an integer number (1653288714).

Almost surely, 2^56121091104 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 56121091104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79357858272).

56121091104 is an abundant number, since it is smaller than the sum of its proper divisors (102594625440).

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

56121091104 is a wasteful number, since it uses less digits than its factorization.

56121091104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18650 (or 18642 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 30.

The spelling of 56121091104 in words is "fifty-six billion, one hundred twenty-one million, ninety-one thousand, one hundred four".