1916087649 has 32 divisors (see below), whose sum is σ = 3021373440. Its totient is φ = 1056974400.

The previous prime is 1916087639. The next prime is 1916087669. The reversal of 1916087649 is 9467806191.

It is a happy number.

It is not a de Polignac number, because 1916087649 - 2¹¹ = 1916085601 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1916087639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 277167 + ... + 283995.

It is an arithmetic number, because the mean of its divisors is an integer number (94417920).

Almost surely, 2^1916087649 is an apocalyptic number.

It is an amenable number.

1916087649 is a deficient number, since it is larger than the sum of its proper divisors (1105285791).

1916087649 is a wasteful number, since it uses less digits than its factorization.

1916087649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7301.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 1916087649 is about 43773.1384412861. The cubic root of 1916087649 is about 1242.0482210864.

The spelling of 1916087649 in words is "one billion, nine hundred sixteen million, eighty-seven thousand, six hundred forty-nine".