1002154111549 has 2 divisors, whose sum is σ = 1002154111550. Its totient is φ = 1002154111548.

The previous prime is 1002154111489. The next prime is 1002154111561. The reversal of 1002154111549 is 9451114512001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 998036964324 + 4117147225 = 999018^2 + 64165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002154111549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002154111249) 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, 501077055774 + 501077055775.

It is an arithmetic number, because the mean of its divisors is an integer number (501077055775).

Almost surely, 2^{1002154111549} is an apocalyptic number.

It is an amenable number.

1002154111549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002154111549 is an equidigital number, since it uses as much as digits as its factorization.

1002154111549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 34.

The spelling of 1002154111549 in words is "one trillion, two billion, one hundred fifty-four million, one hundred eleven thousand, five hundred forty-nine".