1056621045644 has 6 divisors (see below), whose sum is σ = 1849086829884. Its totient is φ = 528310522820.

The previous prime is 1056621045643. The next prime is 1056621045653. The reversal of 1056621045644 is 4465401266501.

It is a super-2 number, since 2×1056621045644² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1056621045595 and 1056621045604.

It is not an unprimeable number, because it can be changed into a prime (1056621045643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132077630702 + ... + 132077630709.

It is an arithmetic number, because the mean of its divisors is an integer number (308181138314).

Almost surely, 2^{1056621045644} is an apocalyptic number.

It is an amenable number.

1056621045644 is a deficient number, since it is larger than the sum of its proper divisors (792465784240).

1056621045644 is a wasteful number, since it uses less digits than its factorization.

1056621045644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264155261415 (or 264155261413 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 1056621045644 in words is "one trillion, fifty-six billion, six hundred twenty-one million, forty-five thousand, six hundred forty-four".