1916986650 has 96 divisors (see below), whose sum is σ = 4987180800. Its totient is φ = 486731520.

The previous prime is 1916986573. The next prime is 1916986667. The reversal of 1916986650 is 566896191.

It is a junction number, because it is equal to n+sod(n) for n = 1916986593 and 1916986602.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 257176 + ... + 264524.

It is an arithmetic number, because the mean of its divisors is an integer number (51949800).

Almost surely, 2^1916986650 is an apocalyptic number.

1916986650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1916986650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2493590400).

1916986650 is an abundant number, since it is smaller than the sum of its proper divisors (3070194150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1916986650 is a wasteful number, since it uses less digits than its factorization.

1916986650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7448 (or 7443 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 51.

The square root of 1916986650 is about 43783.4061032259. The cubic root of 1916986650 is about 1242.2424411521.

The spelling of 1916986650 in words is "one billion, nine hundred sixteen million, nine hundred eighty-six thousand, six hundred fifty".