40515510243 has 24 divisors (see below), whose sum is σ = 58522547952. Its totient is φ = 24921207168.

The previous prime is 40515510241. The next prime is 40515510293. The reversal of 40515510243 is 34201551504.

It is not a de Polignac number, because 40515510243 - 2¹ = 40515510241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40515510243.

It is not an unprimeable number, because it can be changed into a prime (40515510241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1165705 + ... + 1199957.

It is an arithmetic number, because the mean of its divisors is an integer number (2438439498).

Almost surely, 2^40515510243 is an apocalyptic number.

40515510243 is a deficient number, since it is larger than the sum of its proper divisors (18007037709).

40515510243 is a wasteful number, since it uses less digits than its factorization.

40515510243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36615 (or 36602 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 40515510243 in words is "forty billion, five hundred fifteen million, five hundred ten thousand, two hundred forty-three".