11523450645544 has 16 divisors (see below), whose sum is σ = 21629727746100. Its totient is φ = 5755523246592.

The previous prime is 11523450645409. The next prime is 11523450645583. The reversal of 11523450645544 is 44554605432511.

It can be written as a sum of positive squares in 2 ways, for example, as 10786376884644 + 737073760900 = 3284262^2 + 858530^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775251627 + ... + 775266490.

Almost surely, 2^{11523450645544} is an apocalyptic number.

It is an amenable number.

11523450645544 is a deficient number, since it is larger than the sum of its proper divisors (10106277100556).

11523450645544 is a wasteful number, since it uses less digits than its factorization.

11523450645544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550519052 (or 1550519048 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 49.

The spelling of 11523450645544 in words is "eleven trillion, five hundred twenty-three billion, four hundred fifty million, six hundred forty-five thousand, five hundred forty-four".