1648792818 has 24 divisors (see below), whose sum is σ = 3612527100. Its totient is φ = 543421824.

The previous prime is 1648792813. The next prime is 1648792823. The reversal of 1648792818 is 8182978461.

It is an interprime number because it is at equal distance from previous prime (1648792813) and next prime (1648792823).

It can be written as a sum of positive squares in 2 ways, for example, as 1361388609 + 287404209 = 36897^2 + 16953^2 .

It is a super-2 number, since 2×1648792818² = 5437035513376762248, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1648792813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 513003 + ... + 516206.

Almost surely, 2^1648792818 is an apocalyptic number.

1648792818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1648792818 is an abundant number, since it is smaller than the sum of its proper divisors (1963734282).

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

1648792818 is a wasteful number, since it uses less digits than its factorization.

1648792818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029306 (or 1029303 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The square root of 1648792818 is about 40605.3299210830. The cubic root of 1648792818 is about 1181.3775012453.

The spelling of 1648792818 in words is "one billion, six hundred forty-eight million, seven hundred ninety-two thousand, eight hundred eighteen".