1144564645 has 16 divisors (see below), whose sum is σ = 1576614528. Its totient is φ = 781381440.

The previous prime is 1144564643. The next prime is 1144564649. The reversal of 1144564645 is 5464654411.

It is a happy number.

It is not a de Polignac number, because 1144564645 - 2¹ = 1144564643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1144564598 and 1144564607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144564643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64086 + ... + 79975.

It is an arithmetic number, because the mean of its divisors is an integer number (98538408).

Almost surely, 2^1144564645 is an apocalyptic number.

It is an amenable number.

1144564645 is a deficient number, since it is larger than the sum of its proper divisors (432049883).

1144564645 is a wasteful number, since it uses less digits than its factorization.

1144564645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144300.

The product of its digits is 230400, while the sum is 40.

The square root of 1144564645 is about 33831.4150605617. The cubic root of 1144564645 is about 1046.0363474117.

The spelling of 1144564645 in words is "one billion, one hundred forty-four million, five hundred sixty-four thousand, six hundred forty-five".