1649500500 has 96 divisors (see below), whose sum is σ = 4861584000. Its totient is φ = 434534400.

The previous prime is 1649500493. The next prime is 1649500519. The reversal of 1649500500 is 50059461.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117876 + ... + 131124.

It is an arithmetic number, because the mean of its divisors is an integer number (50641500).

Almost surely, 2^1649500500 is an apocalyptic number.

1649500500 is a gapful number since it is divisible by the number (10) 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 1649500500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2430792000).

1649500500 is an abundant number, since it is smaller than the sum of its proper divisors (3212083500).

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

1649500500 is a wasteful number, since it uses less digits than its factorization.

1649500500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13354 (or 13342 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1649500500 is about 40614.0431378113. The cubic root of 1649500500 is about 1181.5464976164.

Adding to 1649500500 its reverse (50059461), we get a palindrome (1699559961).

The spelling of 1649500500 in words is "one billion, six hundred forty-nine million, five hundred thousand, five hundred".