1055161561 has 16 divisors (see below), whose sum is σ = 1132185600. Its totient is φ = 980475408.

The previous prime is 1055161543. The next prime is 1055161567. The reversal of 1055161561 is 1651615501.

It is a cyclic number.

It is not a de Polignac number, because 1055161561 - 2¹¹ = 1055159513 is a prime.

It is a super-2 number, since 2×1055161561² = 2226731839623913442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055161567) 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 in 15 ways as a sum of consecutive naturals, for example, 206880 + ... + 211918.

It is an arithmetic number, because the mean of its divisors is an integer number (70761600).

Almost surely, 2^1055161561 is an apocalyptic number.

It is an amenable number.

1055161561 is a deficient number, since it is larger than the sum of its proper divisors (77024039).

1055161561 is a wasteful number, since it uses less digits than its factorization.

1055161561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5268.

The product of its (nonzero) digits is 4500, while the sum is 31.

The square root of 1055161561 is about 32483.2504685107. The cubic root of 1055161561 is about 1018.0590929527.

The spelling of 1055161561 in words is "one billion, fifty-five million, one hundred sixty-one thousand, five hundred sixty-one".