40239048251 has 4 divisors (see below), whose sum is σ = 41988572112. Its totient is φ = 38489524392.

The previous prime is 40239048211. The next prime is 40239048257. The reversal of 40239048251 is 15284093204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40239048251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40239048257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 874761896 + ... + 874761941.

It is an arithmetic number, because the mean of its divisors is an integer number (10497143028).

Almost surely, 2^40239048251 is an apocalyptic number.

40239048251 is a deficient number, since it is larger than the sum of its proper divisors (1749523861).

40239048251 is a wasteful number, since it uses less digits than its factorization.

40239048251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749523860.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 40239048251 in words is "forty billion, two hundred thirty-nine million, forty-eight thousand, two hundred fifty-one".