40521688386 has 16 divisors (see below), whose sum is σ = 81135377568. Its totient is φ = 13491896000.

The previous prime is 40521688369. The next prime is 40521688387. The reversal of 40521688386 is 68388612504.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40521688387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3827640 + ... + 3838211.

It is an arithmetic number, because the mean of its divisors is an integer number (5070961098).

Almost surely, 2^40521688386 is an apocalyptic number.

40521688386 is an abundant number, since it is smaller than the sum of its proper divisors (40613689182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40521688386 is a wasteful number, since it uses less digits than its factorization.

40521688386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7666737.

The product of its (nonzero) digits is 2211840, while the sum is 51.

The spelling of 40521688386 in words is "forty billion, five hundred twenty-one million, six hundred eighty-eight thousand, three hundred eighty-six".