161554624617 has 8 divisors (see below), whose sum is σ = 215412105600. Its totient is φ = 107700113360.

The previous prime is 161554624613. The next prime is 161554624631. The reversal of 161554624617 is 716426455161.

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 161554624617 - 2² = 161554624613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161554624613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612234 + ... + 835427.

It is an arithmetic number, because the mean of its divisors is an integer number (26926513200).

Almost surely, 2^161554624617 is an apocalyptic number.

It is an amenable number.

161554624617 is a deficient number, since it is larger than the sum of its proper divisors (53857480983).

161554624617 is a wasteful number, since it uses less digits than its factorization.

161554624617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484863.

The product of its digits is 1209600, while the sum is 48.

The spelling of 161554624617 in words is "one hundred sixty-one billion, five hundred fifty-four million, six hundred twenty-four thousand, six hundred seventeen".