161429720495 has 4 divisors (see below), whose sum is σ = 193715664600. Its totient is φ = 129143776392.

The previous prime is 161429720489. The next prime is 161429720527. The reversal of 161429720495 is 594027924161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 594027924161 = 7 ⋅84861132023.

It is a cyclic number.

It is not a de Polignac number, because 161429720495 - 2⁸ = 161429720239 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16142972045 + ... + 16142972054.

It is an arithmetic number, because the mean of its divisors is an integer number (48428916150).

Almost surely, 2^161429720495 is an apocalyptic number.

161429720495 is a deficient number, since it is larger than the sum of its proper divisors (32285944105).

161429720495 is an equidigital number, since it uses as much as digits as its factorization.

161429720495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32285944104.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 161429720495 in words is "one hundred sixty-one billion, four hundred twenty-nine million, seven hundred twenty thousand, four hundred ninety-five".