1648612660 has 12 divisors (see below), whose sum is σ = 3462086628. Its totient is φ = 659445056.

The previous prime is 1648612639. The next prime is 1648612673. The reversal of 1648612660 is 662168461.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 766403856 + 882208804 = 27684^2 + 29702^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41215297 + ... + 41215336.

It is an arithmetic number, because the mean of its divisors is an integer number (288507219).

Almost surely, 2^1648612660 is an apocalyptic number.

1648612660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1648612660 is an abundant number, since it is smaller than the sum of its proper divisors (1813473968).

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

1648612660 is a wasteful number, since it uses less digits than its factorization.

1648612660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82430642 (or 82430640 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 1648612660 is about 40603.1114571285. Note that the first 3 decimals coincide. The cubic root of 1648612660 is about 1181.3344713069.

The spelling of 1648612660 in words is "one billion, six hundred forty-eight million, six hundred twelve thousand, six hundred sixty".