1648478520 has 128 divisors (see below), whose sum is σ = 5917665600. Its totient is φ = 405775872.

The previous prime is 1648478509. The next prime is 1648478561. The reversal of 1648478520 is 258748461.

1648478520 is a `hidden beast` number, since 16 + 48 + 4 + 78 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 44667 + ... + 72746.

Almost surely, 2^1648478520 is an apocalyptic number.

1648478520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1648478520 is an abundant number, since it is smaller than the sum of its proper divisors (4269187080).

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

1648478520 is a wasteful number, since it uses less digits than its factorization.

1648478520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117446 (or 117436 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 1648478520 is about 40601.4595796752. The cubic root of 1648478520 is about 1181.3024305274.

The spelling of 1648478520 in words is "one billion, six hundred forty-eight million, four hundred seventy-eight thousand, five hundred twenty".