1145615663 has 4 divisors (see below), whose sum is σ = 1145936880. Its totient is φ = 1145294448.

The previous prime is 1145615657. The next prime is 1145615689. The reversal of 1145615663 is 3665165411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3665165411 = 727 ⋅5041493.

It is a cyclic number.

It is not a de Polignac number, because 1145615663 - 2⁶ = 1145615599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145615693) 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, 155198 + ... + 162411.

It is an arithmetic number, because the mean of its divisors is an integer number (286484220).

Almost surely, 2^1145615663 is an apocalyptic number.

1145615663 is a deficient number, since it is larger than the sum of its proper divisors (321217).

1145615663 is an equidigital number, since it uses as much as digits as its factorization.

1145615663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321216.

The product of its digits is 64800, while the sum is 38.

The square root of 1145615663 is about 33846.9446627018. The cubic root of 1145615663 is about 1046.3564303039.

The spelling of 1145615663 in words is "one billion, one hundred forty-five million, six hundred fifteen thousand, six hundred sixty-three".