1455555689 has 4 divisors (see below), whose sum is σ = 1663492224. Its totient is φ = 1247619156.

The previous prime is 1455555677. The next prime is 1455555701. The reversal of 1455555689 is 9865555541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9865555541 = 1181 ⋅8353561.

It is an interprime number because it is at equal distance from previous prime (1455555677) and next prime (1455555701).

It is not a de Polignac number, because 1455555689 - 2¹² = 1455551593 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1455555689.

It is not an unprimeable number, because it can be changed into a prime (1455555659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103968257 + ... + 103968270.

It is an arithmetic number, because the mean of its divisors is an integer number (415873056).

Almost surely, 2^1455555689 is an apocalyptic number.

It is an amenable number.

1455555689 is a deficient number, since it is larger than the sum of its proper divisors (207936535).

1455555689 is an equidigital number, since it uses as much as digits as its factorization.

1455555689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207936534.

The product of its digits is 5400000, while the sum is 53.

The square root of 1455555689 is about 38151.7455563962. The cubic root of 1455555689 is about 1133.2949199110.

The spelling of 1455555689 in words is "one billion, four hundred fifty-five million, five hundred fifty-five thousand, six hundred eighty-nine".