102044157678409 has 2 divisors, whose sum is σ = 102044157678410. Its totient is φ = 102044157678408.

The previous prime is 102044157678367. The next prime is 102044157678413. The reversal of 102044157678409 is 904876751440201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98724036384009 + 3320121294400 = 9935997^2 + 1822120^2 .

It is a cyclic number.

It is not a de Polignac number, because 102044157678409 - 2⁹ = 102044157677897 is a prime.

It is not a weakly prime, because it can be changed into another prime (102044157678479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51022078839204 + 51022078839205.

It is an arithmetic number, because the mean of its divisors is an integer number (51022078839205).

Almost surely, 2^{102044157678409} is an apocalyptic number.

It is an amenable number.

102044157678409 is a deficient number, since it is larger than the sum of its proper divisors (1).

102044157678409 is an equidigital number, since it uses as much as digits as its factorization.

102044157678409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13547520, while the sum is 58.

The spelling of 102044157678409 in words is "one hundred two trillion, forty-four billion, one hundred fifty-seven million, six hundred seventy-eight thousand, four hundred nine".