1648685418 has 16 divisors (see below), whose sum is σ = 3330019296. Its totient is φ = 544120400.

The previous prime is 1648685413. The next prime is 1648685419. The reversal of 1648685418 is 8145868461.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1648685413) 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, 1359696 + ... + 1360907.

It is an arithmetic number, because the mean of its divisors is an integer number (208126206).

Almost surely, 2^1648685418 is an apocalyptic number.

1648685418 is an abundant number, since it is smaller than the sum of its proper divisors (1681333878).

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

1648685418 is a wasteful number, since it uses less digits than its factorization.

1648685418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2720709.

The product of its digits is 1474560, while the sum is 51.

The square root of 1648685418 is about 40604.0074130621. The cubic root of 1648685418 is about 1181.3518496095.

The spelling of 1648685418 in words is "one billion, six hundred forty-eight million, six hundred eighty-five thousand, four hundred eighteen".