161553758705 has 16 divisors (see below), whose sum is σ = 198233650944. Its totient is φ = 126337034880.

The previous prime is 161553758693. The next prime is 161553758719. The reversal of 161553758705 is 507857355161.

It is not a de Polignac number, because 161553758705 - 2¹⁰ = 161553757681 is a prime.

It is a Duffinian 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, 233252 + ... + 614421.

It is an arithmetic number, because the mean of its divisors is an integer number (12389603184).

Almost surely, 2^161553758705 is an apocalyptic number.

It is an amenable number.

161553758705 is a deficient number, since it is larger than the sum of its proper divisors (36679892239).

161553758705 is an equidigital number, since it uses as much as digits as its factorization.

161553758705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848536.

The product of its (nonzero) digits is 4410000, while the sum is 53.

The spelling of 161553758705 in words is "one hundred sixty-one billion, five hundred fifty-three million, seven hundred fifty-eight thousand, seven hundred five".