1916639756 has 12 divisors (see below), whose sum is σ = 3354971592. Its totient is φ = 958076448.

The previous prime is 1916639741. The next prime is 1916639773. The reversal of 1916639756 is 6579366191.

It is a junction number, because it is equal to n+sod(n) for n = 1916639698 and 1916639707.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42530 + ... + 75113.

It is an arithmetic number, because the mean of its divisors is an integer number (279580966).

Almost surely, 2^1916639756 is an apocalyptic number.

It is an amenable number.

1916639756 is a deficient number, since it is larger than the sum of its proper divisors (1438331836).

1916639756 is a wasteful number, since it uses less digits than its factorization.

1916639756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121720 (or 121718 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 53.

The square root of 1916639756 is about 43779.4444459954. Note that the first 5 decimals coincide. The cubic root of 1916639756 is about 1242.1675054111.

The spelling of 1916639756 in words is "one billion, nine hundred sixteen million, six hundred thirty-nine thousand, seven hundred fifty-six".