40239940901 has 16 divisors (see below), whose sum is σ = 42263544960. Its totient is φ = 38260031040.

The previous prime is 40239940861. The next prime is 40239940903. The reversal of 40239940901 is 10904993204.

It is a cyclic number.

It is not a de Polignac number, because 40239940901 - 2¹⁸ = 40239678757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40239940903) by changing a digit.

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, 1807031 + ... + 1829163.

It is an arithmetic number, because the mean of its divisors is an integer number (2641471560).

Almost surely, 2^40239940901 is an apocalyptic number.

It is an amenable number.

40239940901 is a deficient number, since it is larger than the sum of its proper divisors (2023604059).

40239940901 is a wasteful number, since it uses less digits than its factorization.

40239940901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23116.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 40239940901 in words is "forty billion, two hundred thirty-nine million, nine hundred forty thousand, nine hundred one".