40642816121 has 8 divisors (see below), whose sum is σ = 41026868064. Its totient is φ = 40258842400.

The previous prime is 40642816087. The next prime is 40642816127. The reversal of 40642816121 is 12161824604.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40642816121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40642816127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2001821 + ... + 2022021.

It is an arithmetic number, because the mean of its divisors is an integer number (5128358508).

Almost surely, 2^40642816121 is an apocalyptic number.

It is an amenable number.

40642816121 is a deficient number, since it is larger than the sum of its proper divisors (384051943).

40642816121 is a wasteful number, since it uses less digits than its factorization.

40642816121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39111.

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 40642816121 in words is "forty billion, six hundred forty-two million, eight hundred sixteen thousand, one hundred twenty-one".