1955992161 has 8 divisors (see below), whose sum is σ = 2678475904. Its totient is φ = 1268751600.

The previous prime is 1955992153. The next prime is 1955992177. The reversal of 1955992161 is 1612995591.

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

It is not a de Polignac number, because 1955992161 - 2³ = 1955992153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1955992161.

It is not an unprimeable number, because it can be changed into a prime (1955992111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8810665 + ... + 8810886.

It is an arithmetic number, because the mean of its divisors is an integer number (334809488).

Almost surely, 2^1955992161 is an apocalyptic number.

It is an amenable number.

1955992161 is a deficient number, since it is larger than the sum of its proper divisors (722483743).

1955992161 is a wasteful number, since it uses less digits than its factorization.

1955992161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17621591.

The product of its digits is 218700, while the sum is 48.

The square root of 1955992161 is about 44226.6001519448. The cubic root of 1955992161 is about 1250.6113619538.

The spelling of 1955992161 in words is "one billion, nine hundred fifty-five million, nine hundred ninety-two thousand, one hundred sixty-one".