40243663331489 has 16 divisors (see below), whose sum is σ = 42988639356432. Its totient is φ = 37540663738368.

The previous prime is 40243663331447. The next prime is 40243663331653. The reversal of 40243663331489 is 98413336634204.

It can be written as a sum of positive squares in 8 ways, for example, as 420091941025 + 39823571390464 = 648145^2 + 6310592^2 .

It is a cyclic number.

It is not a de Polignac number, because 40243663331489 - 2²⁴ = 40243646554273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40243663321489) 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, 214891277 + ... + 215078469.

It is an arithmetic number, because the mean of its divisors is an integer number (2686789959777).

Almost surely, 2^{40243663331489} is an apocalyptic number.

It is an amenable number.

40243663331489 is a deficient number, since it is larger than the sum of its proper divisors (2744976024943).

40243663331489 is a wasteful number, since it uses less digits than its factorization.

40243663331489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299236.

The product of its (nonzero) digits is 26873856, while the sum is 56.

The spelling of 40243663331489 in words is "forty trillion, two hundred forty-three billion, six hundred sixty-three million, three hundred thirty-one thousand, four hundred eighty-nine".