40161108672421 has 8 divisors (see below), whose sum is σ = 43812947721600. Its totient is φ = 36509407818240.

The previous prime is 40161108672413. The next prime is 40161108672427. The reversal of 40161108672421 is 12427680116104.

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

It is a cyclic number.

It is not a de Polignac number, because 40161108672421 - 2³ = 40161108672413 is a prime.

It is a super-2 number, since 2×40161108672421² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40161108672427) 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, 33940636 + ... + 35103973.

It is an arithmetic number, because the mean of its divisors is an integer number (5476618465200).

Almost surely, 2^{40161108672421} is an apocalyptic number.

It is an amenable number.

40161108672421 is a deficient number, since it is larger than the sum of its proper divisors (3651839049179).

40161108672421 is a wasteful number, since it uses less digits than its factorization.

40161108672421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69097499.

The product of its (nonzero) digits is 129024, while the sum is 43.

Adding to 40161108672421 its reverse (12427680116104), we get a palindrome (52588788788525).

The spelling of 40161108672421 in words is "forty trillion, one hundred sixty-one billion, one hundred eight million, six hundred seventy-two thousand, four hundred twenty-one".