161604031929755 has 8 divisors (see below), whose sum is σ = 193924908075600. Its totient is φ = 129283179037216.

The previous prime is 161604031929733. The next prime is 161604031929803. The reversal of 161604031929755 is 557929130406161.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 161604031929755 - 2³⁸ = 161329154022811 is a prime.

It is a super-2 number, since 2×161604031929755² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161604031929694 and 161604031929703.

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, 19482656 + ... + 26510034.

It is an arithmetic number, because the mean of its divisors is an integer number (24240613509450).

Almost surely, 2^{161604031929755} is an apocalyptic number.

161604031929755 is a deficient number, since it is larger than the sum of its proper divisors (32320876145845).

161604031929755 is an equidigital number, since it uses as much as digits as its factorization.

161604031929755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11626653.

The product of its (nonzero) digits is 12247200, while the sum is 59.

The spelling of 161604031929755 in words is "one hundred sixty-one trillion, six hundred four billion, thirty-one million, nine hundred twenty-nine thousand, seven hundred fifty-five".