161405676073 has 2 divisors, whose sum is σ = 161405676074. Its totient is φ = 161405676072.

The previous prime is 161405676049. The next prime is 161405676137. The reversal of 161405676073 is 370676504161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86946547689 + 74459128384 = 294867^2 + 272872^2 .

It is a cyclic number.

It is not a de Polignac number, because 161405676073 - 2¹³ = 161405667881 is a prime.

It is not a weakly prime, because it can be changed into another prime (161405676373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80702838036 + 80702838037.

It is an arithmetic number, because the mean of its divisors is an integer number (80702838037).

Almost surely, 2^161405676073 is an apocalyptic number.

It is an amenable number.

161405676073 is a deficient number, since it is larger than the sum of its proper divisors (1).

161405676073 is an equidigital number, since it uses as much as digits as its factorization.

161405676073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 161405676073 in words is "one hundred sixty-one billion, four hundred five million, six hundred seventy-six thousand, seventy-three".