40040020651 has 8 divisors (see below), whose sum is σ = 41267096640. Its totient is φ = 38828576448.

The previous prime is 40040020637. The next prime is 40040020681. The reversal of 40040020651 is 15602004004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40040020651 - 2⁵ = 40040020619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40040020681) 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 7 ways as a sum of consecutive naturals, for example, 3902746 + ... + 3912991.

It is an arithmetic number, because the mean of its divisors is an integer number (5158387080).

Almost surely, 2^40040020651 is an apocalyptic number.

40040020651 is a deficient number, since it is larger than the sum of its proper divisors (1227075989).

40040020651 is a wasteful number, since it uses less digits than its factorization.

40040020651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7815893.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 40040020651 its reverse (15602004004), we get a palindrome (55642024655).

The spelling of 40040020651 in words is "forty billion, forty million, twenty thousand, six hundred fifty-one".