1091852166137 has 2 divisors, whose sum is σ = 1091852166138. Its totient is φ = 1091852166136.

The previous prime is 1091852166113. The next prime is 1091852166143. The reversal of 1091852166137 is 7316612581901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 789149732281 + 302702433856 = 888341^2 + 550184^2 .

It is a cyclic number.

It is not a de Polignac number, because 1091852166137 - 2¹⁴ = 1091852149753 is a prime.

It is not a weakly prime, because it can be changed into another prime (1091852166637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545926083068 + 545926083069.

It is an arithmetic number, because the mean of its divisors is an integer number (545926083069).

Almost surely, 2^{1091852166137} is an apocalyptic number.

It is an amenable number.

1091852166137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091852166137 is an equidigital number, since it uses as much as digits as its factorization.

1091852166137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 1091852166137 in words is "one trillion, ninety-one billion, eight hundred fifty-two million, one hundred sixty-six thousand, one hundred thirty-seven".