1356606640 has 40 divisors (see below), whose sum is σ = 3176827920. Its totient is φ = 538734336.

The previous prime is 1356606611. The next prime is 1356606673. The reversal of 1356606640 is 466066531.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1356606640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49879 + ... + 72118.

It is an arithmetic number, because the mean of its divisors is an integer number (79420698).

Almost surely, 2^1356606640 is an apocalyptic number.

1356606640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1356606640 is an abundant number, since it is smaller than the sum of its proper divisors (1820221280).

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

1356606640 is a wasteful number, since it uses less digits than its factorization.

1356606640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122149 (or 122143 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 1356606640 is about 36832.1413985123. The cubic root of 1356606640 is about 1107.0094106204.

The spelling of 1356606640 in words is "one billion, three hundred fifty-six million, six hundred six thousand, six hundred forty".