1648918540 has 24 divisors (see below), whose sum is σ = 3582134640. Its totient is φ = 636823488.

The previous prime is 1648918529. The next prime is 1648918541. The reversal of 1648918540 is 458198461.

It is not an unprimeable number, because it can be changed into a prime (1648918541) 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, 1420902 + ... + 1422061.

It is an arithmetic number, because the mean of its divisors is an integer number (149255610).

Almost surely, 2^1648918540 is an apocalyptic number.

1648918540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1648918540 is an abundant number, since it is smaller than the sum of its proper divisors (1933216100).

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

1648918540 is a wasteful number, since it uses less digits than its factorization.

1648918540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843001 (or 2842999 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 1648918540 is about 40606.8779888334. The cubic root of 1648918540 is about 1181.4075275299.

The spelling of 1648918540 in words is "one billion, six hundred forty-eight million, nine hundred eighteen thousand, five hundred forty".