161099131595 has 8 divisors (see below), whose sum is σ = 193321196640. Its totient is φ = 128877812800.

The previous prime is 161099131591. The next prime is 161099131651. The reversal of 161099131595 is 595131990161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161099131595 - 2² = 161099131591 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161099131591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559895 + ... + 797295.

It is an arithmetic number, because the mean of its divisors is an integer number (24165149580).

Almost surely, 2^161099131595 is an apocalyptic number.

161099131595 is a deficient number, since it is larger than the sum of its proper divisors (32222065045).

161099131595 is a wasteful number, since it uses less digits than its factorization.

161099131595 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373125.

The product of its (nonzero) digits is 328050, while the sum is 50.

The spelling of 161099131595 in words is "one hundred sixty-one billion, ninety-nine million, one hundred thirty-one thousand, five hundred ninety-five".