1356455561 has 8 divisors (see below), whose sum is σ = 1400653824. Its totient is φ = 1312284960.

The previous prime is 1356455549. The next prime is 1356455563. The reversal of 1356455561 is 1655546531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1356455561 - 2¹⁸ = 1356193417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356455563) 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, 148616 + ... + 157478.

It is an arithmetic number, because the mean of its divisors is an integer number (175081728).

Almost surely, 2^1356455561 is an apocalyptic number.

It is an amenable number.

1356455561 is a deficient number, since it is larger than the sum of its proper divisors (44198263).

1356455561 is an equidigital number, since it uses as much as digits as its factorization.

1356455561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13831.

The product of its digits is 270000, while the sum is 41.

The square root of 1356455561 is about 36830.0904288871. The cubic root of 1356455561 is about 1106.9683149240.

The spelling of 1356455561 in words is "one billion, three hundred fifty-six million, four hundred fifty-five thousand, five hundred sixty-one".