1056621026056 has 16 divisors (see below), whose sum is σ = 1981194806700. Its totient is φ = 528302410944.

The previous prime is 1056621025937. The next prime is 1056621026059. The reversal of 1056621026056 is 6506201266501.

It can be written as a sum of positive squares in 2 ways, for example, as 723537372100 + 333083653956 = 850610^2 + 577134^2 .

It is a super-2 number, since 2×1056621026056² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1056621026059) 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 3 ways as a sum of consecutive naturals, for example, 439411 + ... + 1518658.

Almost surely, 2^{1056621026056} is an apocalyptic number.

It is an amenable number.

1056621026056 is a deficient number, since it is larger than the sum of its proper divisors (924573780644).

1056621026056 is a wasteful number, since it uses less digits than its factorization.

1056621026056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2025528 (or 2025524 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 1056621026056 in words is "one trillion, fifty-six billion, six hundred twenty-one million, twenty-six thousand, fifty-six".