161070911583 has 4 divisors (see below), whose sum is σ = 214761215448. Its totient is φ = 107380607720.

The previous prime is 161070911569. The next prime is 161070911611. The reversal of 161070911583 is 385119070161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161070911583 - 2²⁶ = 161003802719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161070911503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26845151928 + ... + 26845151933.

It is an arithmetic number, because the mean of its divisors is an integer number (53690303862).

Almost surely, 2^161070911583 is an apocalyptic number.

161070911583 is a deficient number, since it is larger than the sum of its proper divisors (53690303865).

161070911583 is an equidigital number, since it uses as much as digits as its factorization.

161070911583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53690303864.

The product of its (nonzero) digits is 45360, while the sum is 42.

The spelling of 161070911583 in words is "one hundred sixty-one billion, seventy million, nine hundred eleven thousand, five hundred eighty-three".