161012853649 has 2 divisors, whose sum is σ = 161012853650. Its totient is φ = 161012853648.

The previous prime is 161012853629. The next prime is 161012853697. The reversal of 161012853649 is 946358210161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100726890625 + 60285963024 = 317375^2 + 245532^2 .

It is a cyclic number.

It is not a de Polignac number, because 161012853649 - 2²¹ = 161010756497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161012853599 and 161012853608.

It is not a weakly prime, because it can be changed into another prime (161012853629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80506426824 + 80506426825.

It is an arithmetic number, because the mean of its divisors is an integer number (80506426825).

Almost surely, 2^161012853649 is an apocalyptic number.

It is an amenable number.

161012853649 is a deficient number, since it is larger than the sum of its proper divisors (1).

161012853649 is an equidigital number, since it uses as much as digits as its factorization.

161012853649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 161012853649 in words is "one hundred sixty-one billion, twelve million, eight hundred fifty-three thousand, six hundred forty-nine".