40240321651 has 4 divisors (see below), whose sum is σ = 40349968672. Its totient is φ = 40130674632.

The previous prime is 40240321643. The next prime is 40240321687. The reversal of 40240321651 is 15612304204.

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

It is a cyclic number.

It is not a de Polignac number, because 40240321651 - 2³ = 40240321643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40240324651) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 54822960 + ... + 54823693.

It is an arithmetic number, because the mean of its divisors is an integer number (10087492168).

Almost surely, 2^40240321651 is an apocalyptic number.

40240321651 is a deficient number, since it is larger than the sum of its proper divisors (109647021).

40240321651 is a wasteful number, since it uses less digits than its factorization.

40240321651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109647020.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 40240321651 its reverse (15612304204), we get a palindrome (55852625855).

The spelling of 40240321651 in words is "forty billion, two hundred forty million, three hundred twenty-one thousand, six hundred fifty-one".