161751593044 has 24 divisors (see below), whose sum is σ = 292446215936. Its totient is φ = 78199992000.

The previous prime is 161751593039. The next prime is 161751593093. The reversal of 161751593044 is 440395157161.

It is a junction number, because it is equal to n+sod(n) for n = 161751592985 and 161751593003.

It is a congruent number.

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, 411777 + ... + 702184.

Almost surely, 2^161751593044 is an apocalyptic number.

It is an amenable number.

161751593044 is a deficient number, since it is larger than the sum of its proper divisors (130694622892).

161751593044 is a wasteful number, since it uses less digits than its factorization.

161751593044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115167 (or 1115165 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 161751593044 in words is "one hundred sixty-one billion, seven hundred fifty-one million, five hundred ninety-three thousand, forty-four".