56611155720 has 128 divisors (see below), whose sum is σ = 194214528000. Its totient is φ = 12931750656.

The previous prime is 56611155719. The next prime is 56611155721. The reversal of 56611155720 is 2755111665.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56611155719) and next prime (56611155721).

It is not an unprimeable number, because it can be changed into a prime (56611155721) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1407327 + ... + 1446993.

It is an arithmetic number, because the mean of its divisors is an integer number (1517301000).

Almost surely, 2^56611155720 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 56611155720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97107264000).

56611155720 is an abundant number, since it is smaller than the sum of its proper divisors (137603372280).

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

56611155720 is a wasteful number, since it uses less digits than its factorization.

56611155720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41387 (or 41383 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 39.

The spelling of 56611155720 in words is "fifty-six billion, six hundred eleven million, one hundred fifty-five thousand, seven hundred twenty".