161139098361 has 16 divisors (see below), whose sum is σ = 221793504768. Its totient is φ = 103955712000.

The previous prime is 161139098359. The next prime is 161139098383. The reversal of 161139098361 is 163890931161.

It is a happy number.

It is not a de Polignac number, because 161139098361 - 2¹ = 161139098359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161139098361.

It is not an unprimeable number, because it can be changed into a prime (161139098321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3752311 + ... + 3795011.

It is an arithmetic number, because the mean of its divisors is an integer number (13862094048).

Almost surely, 2^161139098361 is an apocalyptic number.

It is an amenable number.

161139098361 is a deficient number, since it is larger than the sum of its proper divisors (60654406407).

161139098361 is a wasteful number, since it uses less digits than its factorization.

161139098361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83312.

The product of its (nonzero) digits is 209952, while the sum is 48.

The spelling of 161139098361 in words is "one hundred sixty-one billion, one hundred thirty-nine million, ninety-eight thousand, three hundred sixty-one".