56121456534 has 64 divisors (see below), whose sum is σ = 131954054400. Its totient is φ = 15687803520.

The previous prime is 56121456467. The next prime is 56121456569. The reversal of 56121456534 is 43565412165.

56121456534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1307929 + ... + 1350155.

It is an arithmetic number, because the mean of its divisors is an integer number (2061782100).

Almost surely, 2^56121456534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56121456534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65977027200).

56121456534 is an abundant number, since it is smaller than the sum of its proper divisors (75832597866).

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

56121456534 is a wasteful number, since it uses less digits than its factorization.

56121456534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43805.

The product of its digits is 432000, while the sum is 42.

Adding to 56121456534 its reverse (43565412165), we get a palindrome (99686868699).

The spelling of 56121456534 in words is "fifty-six billion, one hundred twenty-one million, four hundred fifty-six thousand, five hundred thirty-four".