40021242045 has 16 divisors (see below), whose sum is σ = 64299694272. Its totient is φ = 21256093440.

The previous prime is 40021242013. The next prime is 40021242103. The reversal of 40021242045 is 54024212004.

It is a happy number.

It is not a de Polignac number, because 40021242045 - 2⁵ = 40021242013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5531827 + ... + 5539056.

It is an arithmetic number, because the mean of its divisors is an integer number (4018730892).

Almost surely, 2^40021242045 is an apocalyptic number.

It is an amenable number.

40021242045 is a deficient number, since it is larger than the sum of its proper divisors (24278452227).

40021242045 is a wasteful number, since it uses less digits than its factorization.

40021242045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11071132.

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 40021242045 its reverse (54024212004), we get a palindrome (94045454049).

The spelling of 40021242045 in words is "forty billion, twenty-one million, two hundred forty-two thousand, forty-five".