1356665056 has 24 divisors (see below), whose sum is σ = 2811511080. Its totient is φ = 642630528.

The previous prime is 1356665039. The next prime is 1356665083. The reversal of 1356665056 is 6505666531.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

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, 1115071 + ... + 1116286.

It is an arithmetic number, because the mean of its divisors is an integer number (117146295).

Almost surely, 2^1356665056 is an apocalyptic number.

1356665056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1356665056 is an abundant number, since it is smaller than the sum of its proper divisors (1454846024).

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

1356665056 is a wasteful number, since it uses less digits than its factorization.

1356665056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231386 (or 2231378 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 43.

The square root of 1356665056 is about 36832.9343930130. The cubic root of 1356665056 is about 1107.0252998083.

The spelling of 1356665056 in words is "one billion, three hundred fifty-six million, six hundred sixty-five thousand, fifty-six".