102158247049 has 2 divisors, whose sum is σ = 102158247050. Its totient is φ = 102158247048.

The previous prime is 102158247043. The next prime is 102158247157. The reversal of 102158247049 is 940742851201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72006355600 + 30151891449 = 268340^2 + 173643^2 .

It is a cyclic number.

It is not a de Polignac number, because 102158247049 - 2⁷ = 102158246921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102158246996 and 102158247014.

It is not a weakly prime, because it can be changed into another prime (102158247043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51079123524 + 51079123525.

It is an arithmetic number, because the mean of its divisors is an integer number (51079123525).

Almost surely, 2^102158247049 is an apocalyptic number.

It is an amenable number.

102158247049 is a deficient number, since it is larger than the sum of its proper divisors (1).

102158247049 is an equidigital number, since it uses as much as digits as its factorization.

102158247049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 102158247049 in words is "one hundred two billion, one hundred fifty-eight million, two hundred forty-seven thousand, forty-nine".