1611706161 has 8 divisors (see below), whose sum is σ = 2314244800. Its totient is φ = 991819152.

The previous prime is 1611706147. The next prime is 1611706169. The reversal of 1611706161 is 1616071161.

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

It is not a de Polignac number, because 1611706161 - 2⁹ = 1611705649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1611706169) 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, 20662861 + ... + 20662938.

It is an arithmetic number, because the mean of its divisors is an integer number (289280600).

Almost surely, 2^1611706161 is an apocalyptic number.

It is an amenable number.

1611706161 is a deficient number, since it is larger than the sum of its proper divisors (702538639).

1611706161 is a wasteful number, since it uses less digits than its factorization.

1611706161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41325815.

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 1611706161 is about 40146.0603422054. The cubic root of 1611706161 is about 1172.4525855262.

It can be divided in two parts, 161170 and 6161, that added together give a triangular number (167331 = T₅₇₈).

The spelling of 1611706161 in words is "one billion, six hundred eleven million, seven hundred six thousand, one hundred sixty-one".