1053511661 has 2 divisors, whose sum is σ = 1053511662. Its totient is φ = 1053511660.

The previous prime is 1053511649. The next prime is 1053511733. The reversal of 1053511661 is 1661153501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 762809161 + 290702500 = 27619^2 + 17050^2 .

It is a cyclic number.

It is not a de Polignac number, because 1053511661 - 2¹⁸ = 1053249517 is a prime.

It is a super-2 number, since 2×1053511661² = 2219773639725957842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1053511631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 526755830 + 526755831.

It is an arithmetic number, because the mean of its divisors is an integer number (526755831).

Almost surely, 2^1053511661 is an apocalyptic number.

It is an amenable number.

1053511661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1053511661 is an equidigital number, since it uses as much as digits as its factorization.

1053511661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 1053511661 is about 32457.8443677334. The cubic root of 1053511661 is about 1017.5281878589.

The spelling of 1053511661 in words is "one billion, fifty-three million, five hundred eleven thousand, six hundred sixty-one".