56828757881 has 6 divisors (see below), whose sum is σ = 66106922490. Its totient is φ = 48710363856.

The previous prime is 56828757803. The next prime is 56828757893. The reversal of 56828757881 is 18875782865.

56828757881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 55979560000 + 849197881 = 236600^2 + 29141^2 .

It is a de Polignac number, because none of the positive numbers 2^k-56828757881 is a prime.

It is a super-3 number, since 3×56828757881³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (56828757281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 579885236 + ... + 579885333.

It is an arithmetic number, because the mean of its divisors is an integer number (11017820415).

Almost surely, 2^56828757881 is an apocalyptic number.

It is an amenable number.

56828757881 is a deficient number, since it is larger than the sum of its proper divisors (9278164609).

56828757881 is a wasteful number, since it uses less digits than its factorization.

56828757881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159770583 (or 1159770576 counting only the distinct ones).

The product of its digits is 60211200, while the sum is 65.

The spelling of 56828757881 in words is "fifty-six billion, eight hundred twenty-eight million, seven hundred fifty-seven thousand, eight hundred eighty-one".