1055922711561 has 9 divisors (see below), whose sum is σ = 1525226147341. Its totient is φ = 703946419212.

The previous prime is 1055922711551. The next prime is 1055922711581. The reversal of 1055922711561 is 1651172295501.

The square root of 1055922711561 is 1027581.

It is a perfect power (a square), and thus also a powerful number.

1055922711561 is a `hidden beast` number, since 1 + 0 + 5 + 59 + 2 + 27 + 11 + 561 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1055922711561 - 2⁷ = 1055922711433 is a prime.

It is a super-2 number, since 2×1055922711561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055922711511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2911480 + ... + 3254006.

Almost surely, 2^{1055922711561} is an apocalyptic number.

1055922711561 is the 1027581-st square number.

1055922711561 is the 513791-st centered octagonal number.

It is an amenable number.

1055922711561 is a deficient number, since it is larger than the sum of its proper divisors (469303435780).

1055922711561 is an frugal number, since it uses more digits than its factorization.

1055922711561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685060 (or 342530 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 45.

The spelling of 1055922711561 in words is "one trillion, fifty-five billion, nine hundred twenty-two million, seven hundred eleven thousand, five hundred sixty-one".