161229082658 has 54 divisors (see below), whose sum is σ = 287774819451. Its totient is φ = 67549640424.

The previous prime is 161229082621. The next prime is 161229082669. The reversal of 161229082658 is 856280922161.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 80614541329 + 80614541329 = 283927^2 + 283927^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=283927.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 186823535 + ... + 186824397.

Almost surely, 2^161229082658 is an apocalyptic number.

161229082658 is a deficient number, since it is larger than the sum of its proper divisors (126545736793).

161229082658 is an frugal number, since it uses more digits than its factorization.

161229082658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836 (or 919 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 50.

Multiplying 161229082658 by its sum of digits (50), we get a square (8061454132900 = 2839270²).

The spelling of 161229082658 in words is "one hundred sixty-one billion, two hundred twenty-nine million, eighty-two thousand, six hundred fifty-eight".