1056621045643 has 2 divisors, whose sum is σ = 1056621045644. Its totient is φ = 1056621045642.

The previous prime is 1056621045517. The next prime is 1056621045653. The reversal of 1056621045643 is 3465401266501.

1056621045643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1056621045643 is a prime.

It is a super-2 number, since 2×1056621045643² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1056621045643.

It is not a weakly prime, because it can be changed into another prime (1056621045653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528310522821 + 528310522822.

It is an arithmetic number, because the mean of its divisors is an integer number (528310522822).

Almost surely, 2^{1056621045643} is an apocalyptic number.

1056621045643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056621045643 is an equidigital number, since it uses as much as digits as its factorization.

1056621045643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 1056621045643 in words is "one trillion, fifty-six billion, six hundred twenty-one million, forty-five thousand, six hundred forty-three".