40521630181351 has 24 divisors (see below), whose sum is σ = 44612316690480. Its totient is φ = 36778297691520.

The previous prime is 40521630181349. The next prime is 40521630181391. The reversal of 40521630181351 is 15318103612504.

It is a happy number.

It is not a de Polignac number, because 40521630181351 - 2¹ = 40521630181349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40521630181391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1110985251 + ... + 1111021723.

It is an arithmetic number, because the mean of its divisors is an integer number (1858846528770).

Almost surely, 2^{40521630181351} is an apocalyptic number.

40521630181351 is a deficient number, since it is larger than the sum of its proper divisors (4090686509129).

40521630181351 is a wasteful number, since it uses less digits than its factorization.

40521630181351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51087 (or 51076 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

Adding to 40521630181351 its reverse (15318103612504), we get a palindrome (55839733793855).

The spelling of 40521630181351 in words is "forty trillion, five hundred twenty-one billion, six hundred thirty million, one hundred eighty-one thousand, three hundred fifty-one".