161135145138916 has 144 divisors (see below), whose sum is σ = 324169549704000. Its totient is φ = 69653376571392.

The previous prime is 161135145138739. The next prime is 161135145138937. The reversal of 161135145138916 is 619831541531161.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7223512635 + ... + 7223534941.

It is an arithmetic number, because the mean of its divisors is an integer number (2251177428500).

Almost surely, 2^{161135145138916} is an apocalyptic number.

It is an amenable number.

161135145138916 is an abundant number, since it is smaller than the sum of its proper divisors (163034404565084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161135145138916 is a wasteful number, since it uses less digits than its factorization.

161135145138916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24686 (or 24667 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 55.

The spelling of 161135145138916 in words is "one hundred sixty-one trillion, one hundred thirty-five billion, one hundred forty-five million, one hundred thirty-eight thousand, nine hundred sixteen".