40243709124 has 18 divisors (see below), whose sum is σ = 101727153710. Its totient is φ = 13414569696.

The previous prime is 40243709087. The next prime is 40243709167. The reversal of 40243709124 is 42190734204.

It can be written as a sum of positive squares in only one way, i.e., 35505864900 + 4737844224 = 188430^2 + 68832^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×40243709124² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1117880809 = 40243709124 / (4 + 0 + 2 + 4 + 3 + 7 + 0 + 9 + 1 + 2 + 4).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 558940369 + ... + 558940440.

Almost surely, 2^40243709124 is an apocalyptic number.

It is an amenable number.

40243709124 is an abundant number, since it is smaller than the sum of its proper divisors (61483444586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40243709124 is a wasteful number, since it uses less digits than its factorization.

40243709124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117880819 (or 1117880814 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 40243709124 in words is "forty billion, two hundred forty-three million, seven hundred nine thousand, one hundred twenty-four".