161460489961 has 2 divisors, whose sum is σ = 161460489962. Its totient is φ = 161460489960.

The previous prime is 161460489947. The next prime is 161460489979. The reversal of 161460489961 is 169984064161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156831048361 + 4629441600 = 396019^2 + 68040^2 .

It is a cyclic number.

It is not a de Polignac number, because 161460489961 - 2¹³ = 161460481769 is a prime.

It is not a weakly prime, because it can be changed into another prime (161460481961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80730244980 + 80730244981.

It is an arithmetic number, because the mean of its divisors is an integer number (80730244981).

Almost surely, 2^161460489961 is an apocalyptic number.

It is an amenable number.

161460489961 is a deficient number, since it is larger than the sum of its proper divisors (1).

161460489961 is an equidigital number, since it uses as much as digits as its factorization.

161460489961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 161460489961 in words is "one hundred sixty-one billion, four hundred sixty million, four hundred eighty-nine thousand, nine hundred sixty-one".