1919081632 has 48 divisors (see below), whose sum is σ = 4083550632. Its totient is φ = 882524160.

The previous prime is 1919081621. The next prime is 1919081639. The reversal of 1919081632 is 2361809191.

It can be written as a sum of positive squares in 4 ways, for example, as 1255710096 + 663371536 = 35436^2 + 25756^2 .

It is not an unprimeable number, because it can be changed into a prime (1919081639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108688 + ... + 125104.

Almost surely, 2^1919081632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1919081632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2041775316).

1919081632 is an abundant number, since it is smaller than the sum of its proper divisors (2164469000).

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

1919081632 is a wasteful number, since it uses less digits than its factorization.

1919081632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16721 (or 16713 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 1919081632 is about 43807.3239538778. The cubic root of 1919081632 is about 1242.6948052986.

The spelling of 1919081632 in words is "one billion, nine hundred nineteen million, eighty-one thousand, six hundred thirty-two".