1123445672945 has 16 divisors (see below), whose sum is σ = 1428240331728. Its totient is φ = 845412372480.

The previous prime is 1123445672939. The next prime is 1123445672971. The reversal of 1123445672945 is 5492765443211.

It can be written as a sum of positive squares in 8 ways, for example, as 371371441 + 1123074301504 = 19271^2 + 1059752^2 .

It is not a de Polignac number, because 1123445672945 - 2²⁸ = 1123177237489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3567866 + ... + 3869955.

It is an arithmetic number, because the mean of its divisors is an integer number (89265020733).

Almost surely, 2^{1123445672945} is an apocalyptic number.

It is an amenable number.

1123445672945 is a deficient number, since it is larger than the sum of its proper divisors (304794658783).

1123445672945 is a wasteful number, since it uses less digits than its factorization.

1123445672945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7439620.

The product of its digits is 7257600, while the sum is 53.

The spelling of 1123445672945 in words is "one trillion, one hundred twenty-three billion, four hundred forty-five million, six hundred seventy-two thousand, nine hundred forty-five".