161025007135789 has 2 divisors, whose sum is σ = 161025007135790. Its totient is φ = 161025007135788.

The previous prime is 161025007135757. The next prime is 161025007135823. The reversal of 161025007135789 is 987531700520161.

161025007135789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105429462373225 + 55595544762564 = 10267885^2 + 7456242^2 .

It is an emirp because it is prime and its reverse (987531700520161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161025007135789 - 2⁵ = 161025007135757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161025007735789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80512503567894 + 80512503567895.

It is an arithmetic number, because the mean of its divisors is an integer number (80512503567895).

Almost surely, 2^{161025007135789} is an apocalyptic number.

It is an amenable number.

161025007135789 is a deficient number, since it is larger than the sum of its proper divisors (1).

161025007135789 is an equidigital number, since it uses as much as digits as its factorization.

161025007135789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3175200, while the sum is 55.

The spelling of 161025007135789 in words is "one hundred sixty-one trillion, twenty-five billion, seven million, one hundred thirty-five thousand, seven hundred eighty-nine".