161841006865854 has 32 divisors (see below), whose sum is σ = 371248187796480. Its totient is φ = 52206776407800.

The previous prime is 161841006865843. The next prime is 161841006865873. The reversal of 161841006865854 is 458568600148161.

161841006865854 is a `hidden beast` number, since 1 + 6 + 1 + 8 + 41 + 0 + 0 + 6 + 8 + 6 + 585 + 4 = 666.

It is a super-2 number, since 2×161841006865854² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161841006865791 and 161841006865800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48339606112 + ... + 48339609459.

It is an arithmetic number, because the mean of its divisors is an integer number (11601505868640).

Almost surely, 2^{161841006865854} is an apocalyptic number.

161841006865854 is an abundant number, since it is smaller than the sum of its proper divisors (209407180930626).

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

161841006865854 is a wasteful number, since it uses less digits than its factorization.

161841006865854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96679215613 (or 96679215607 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 63.

The spelling of 161841006865854 in words is "one hundred sixty-one trillion, eight hundred forty-one billion, six million, eight hundred sixty-five thousand, eight hundred fifty-four".