40065430251 has 64 divisors (see below), whose sum is σ = 67836579840. Its totient is φ = 20428602240.

The previous prime is 40065430243. The next prime is 40065430253. The reversal of 40065430251 is 15203456004.

It is not a de Polignac number, because 40065430251 - 2³ = 40065430243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40065430253) 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 63 ways as a sum of consecutive naturals, for example, 10533316 + ... + 10537118.

It is an arithmetic number, because the mean of its divisors is an integer number (1059946560).

Almost surely, 2^40065430251 is an apocalyptic number.

40065430251 is a deficient number, since it is larger than the sum of its proper divisors (27771149589).

40065430251 is a wasteful number, since it uses less digits than its factorization.

40065430251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4656.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 40065430251 its reverse (15203456004), we get a palindrome (55268886255).

The spelling of 40065430251 in words is "forty billion, sixty-five million, four hundred thirty thousand, two hundred fifty-one".