1916691955 has 4 divisors (see below), whose sum is σ = 2300030352. Its totient is φ = 1533353560.

The previous prime is 1916691949. The next prime is 1916691971. The reversal of 1916691955 is 5591966191.

It is a happy number.

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

It is not a de Polignac number, because 1916691955 - 2⁷ = 1916691827 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191669191 + ... + 191669200.

It is an arithmetic number, because the mean of its divisors is an integer number (575007588).

Almost surely, 2^1916691955 is an apocalyptic number.

1916691955 is a deficient number, since it is larger than the sum of its proper divisors (383338397).

1916691955 is an equidigital number, since it uses as much as digits as its factorization.

1916691955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383338396.

The product of its digits is 656100, while the sum is 52.

The square root of 1916691955 is about 43780.0406007121. The cubic root of 1916691955 is about 1242.1787819717.

The spelling of 1916691955 in words is "one billion, nine hundred sixteen million, six hundred ninety-one thousand, nine hundred fifty-five".