161858161119 has 8 divisors (see below), whose sum is σ = 225193963392. Its totient is φ = 103213899800.

The previous prime is 161858161079. The next prime is 161858161133. The reversal of 161858161119 is 911161858161.

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 161858161119 - 2¹³ = 161858152927 is a prime.

It is a super-2 number, since 2×161858161119² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161858161319) 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, 1172885157 + ... + 1172885294.

It is an arithmetic number, because the mean of its divisors is an integer number (28149245424).

Almost surely, 2^161858161119 is an apocalyptic number.

161858161119 is a deficient number, since it is larger than the sum of its proper divisors (63335802273).

161858161119 is a wasteful number, since it uses less digits than its factorization.

161858161119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345770477.

The product of its digits is 103680, while the sum is 48.

The spelling of 161858161119 in words is "one hundred sixty-one billion, eight hundred fifty-eight million, one hundred sixty-one thousand, one hundred nineteen".