40121736036631 has 4 divisors (see below), whose sum is σ = 40391009433000. Its totient is φ = 39852462640264.

The previous prime is 40121736036541. The next prime is 40121736036703. The reversal of 40121736036631 is 13663063712104.

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 40121736036631 - 2⁴³ = 31325643014423 is a prime.

It is a super-2 number, since 2×40121736036631² (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 (40121736036331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134636697961 + ... + 134636698258.

It is an arithmetic number, because the mean of its divisors is an integer number (10097752358250).

Almost surely, 2^{40121736036631} is an apocalyptic number.

40121736036631 is a deficient number, since it is larger than the sum of its proper divisors (269273396369).

40121736036631 is a wasteful number, since it uses less digits than its factorization.

40121736036631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269273396368.

The product of its (nonzero) digits is 326592, while the sum is 43.

Adding to 40121736036631 its reverse (13663063712104), we get a palindrome (53784799748735).

The spelling of 40121736036631 in words is "forty trillion, one hundred twenty-one billion, seven hundred thirty-six million, thirty-six thousand, six hundred thirty-one".