1455657985 has 8 divisors (see below), whose sum is σ = 1779748200. Its totient is φ = 1142553984.

The previous prime is 1455657949. The next prime is 1455657989. The reversal of 1455657985 is 5897565541.

It can be written as a sum of positive squares in 4 ways, for example, as 357928561 + 1097729424 = 18919^2 + 33132^2 .

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 1455657985 - 2⁷ = 1455657857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1455657989) 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, 2746260 + ... + 2746789.

It is an arithmetic number, because the mean of its divisors is an integer number (222468525).

Almost surely, 2^1455657985 is an apocalyptic number.

It is an amenable number.

1455657985 is a deficient number, since it is larger than the sum of its proper divisors (324090215).

1455657985 is an equidigital number, since it uses as much as digits as its factorization.

1455657985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5493107.

The product of its digits is 7560000, while the sum is 55.

The square root of 1455657985 is about 38153.0861792333. The cubic root of 1455657985 is about 1133.3214684936.

The spelling of 1455657985 in words is "one billion, four hundred fifty-five million, six hundred fifty-seven thousand, nine hundred eighty-five".