1640716992 has 168 divisors, whose sum is σ = 4999888400. Its totient is φ = 527579136.

The previous prime is 1640716933. The next prime is 1640716993. The reversal of 1640716992 is 2996170461.

It is not an unprimeable number, because it can be changed into a prime (1640716993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1452684 + ... + 1453812.

Almost surely, 2^1640716992 is an apocalyptic number.

1640716992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1640716992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2499944200).

1640716992 is an abundant number, since it is smaller than the sum of its proper divisors (3359171408).

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

1640716992 is a wasteful number, since it uses less digits than its factorization.

1640716992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208 (or 1163 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 1640716992 is about 40505.7649230329. The cubic root of 1640716992 is about 1179.4455386090.

The spelling of 1640716992 in words is "one billion, six hundred forty million, seven hundred sixteen thousand, nine hundred ninety-two".