1049251690181 has 2 divisors, whose sum is σ = 1049251690182. Its totient is φ = 1049251690180.

The previous prime is 1049251690159. The next prime is 1049251690183. The reversal of 1049251690181 is 1810961529401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 999340108900 + 49911581281 = 999670^2 + 223409^2 .

It is a cyclic number.

It is not a de Polignac number, because 1049251690181 - 2¹⁸ = 1049251428037 is a prime.

It is a super-2 number, since 2×1049251690181² (a number of 25 digits) contains 22 as substring.

Together with 1049251690183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1049251690183) 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 as a sum of consecutive naturals, namely, 524625845090 + 524625845091.

It is an arithmetic number, because the mean of its divisors is an integer number (524625845091).

Almost surely, 2^{1049251690181} is an apocalyptic number.

It is an amenable number.

1049251690181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1049251690181 is an equidigital number, since it uses as much as digits as its factorization.

1049251690181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 47.

The spelling of 1049251690181 in words is "one trillion, forty-nine billion, two hundred fifty-one million, six hundred ninety thousand, one hundred eighty-one".