1643516248 has 32 divisors (see below), whose sum is σ = 3364578000. Its totient is φ = 746421760.

The previous prime is 1643516197. The next prime is 1643516249. The reversal of 1643516248 is 8426153461.

It is a happy number.

It is a super-2 number, since 2×1643516248² = 5402291314879995008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1643516248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1643516249) 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, 106188 + ... + 120676.

Almost surely, 2^1643516248 is an apocalyptic number.

It is an amenable number.

1643516248 is an abundant number, since it is smaller than the sum of its proper divisors (1721061752).

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

1643516248 is a wasteful number, since it uses less digits than its factorization.

1643516248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15795 (or 15791 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 1643516248 is about 40540.3039949135. The cubic root of 1643516248 is about 1180.1159150708.

The spelling of 1643516248 in words is "one billion, six hundred forty-three million, five hundred sixteen thousand, two hundred forty-eight".