1055100051661 has 2 divisors, whose sum is σ = 1055100051662. Its totient is φ = 1055100051660.

The previous prime is 1055100051611. The next prime is 1055100051679. The reversal of 1055100051661 is 1661500015501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 821187565636 + 233912486025 = 906194^2 + 483645^2 .

It is a cyclic number.

It is not a de Polignac number, because 1055100051661 - 2¹⁵ = 1055100018893 is a prime.

It is a super-2 number, since 2×1055100051661² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1055100051611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527550025830 + 527550025831.

It is an arithmetic number, because the mean of its divisors is an integer number (527550025831).

Almost surely, 2^{1055100051661} is an apocalyptic number.

It is an amenable number.

1055100051661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1055100051661 is an equidigital number, since it uses as much as digits as its factorization.

1055100051661 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 1055100051661 in words is "one trillion, fifty-five billion, one hundred million, fifty-one thousand, six hundred sixty-one".