161371455145 has 8 divisors (see below), whose sum is σ = 193652712000. Its totient is φ = 129092520240.

The previous prime is 161371455103. The next prime is 161371455211. The reversal of 161371455145 is 541554173161.

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

It is not a de Polignac number, because 161371455145 - 2⁹ = 161371454633 is a prime.

It is a super-2 number, since 2×161371455145² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423741 + ... + 708730.

It is an arithmetic number, because the mean of its divisors is an integer number (24206589000).

Almost surely, 2^161371455145 is an apocalyptic number.

It is an amenable number.

161371455145 is a deficient number, since it is larger than the sum of its proper divisors (32281256855).

161371455145 is a wasteful number, since it uses less digits than its factorization.

161371455145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160975.

The product of its digits is 252000, while the sum is 43.

The spelling of 161371455145 in words is "one hundred sixty-one billion, three hundred seventy-one million, four hundred fifty-five thousand, one hundred forty-five".