161342309649 has 16 divisors (see below), whose sum is σ = 229570910208. Its totient is φ = 100437265152.

The previous prime is 161342309641. The next prime is 161342309743. The reversal of 161342309649 is 946903243161.

It is not a de Polignac number, because 161342309649 - 2³ = 161342309641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161342309598 and 161342309607.

It is not an unprimeable number, because it can be changed into a prime (161342309641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12448542 + ... + 12461495.

It is an arithmetic number, because the mean of its divisors is an integer number (14348181888).

Almost surely, 2^161342309649 is an apocalyptic number.

It is an amenable number.

161342309649 is a deficient number, since it is larger than the sum of its proper divisors (68228600559).

161342309649 is a wasteful number, since it uses less digits than its factorization.

161342309649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24910184.

The product of its (nonzero) digits is 839808, while the sum is 48.

The spelling of 161342309649 in words is "one hundred sixty-one billion, three hundred forty-two million, three hundred nine thousand, six hundred forty-nine".