40355386516821 has 8 divisors (see below), whose sum is σ = 53807226348384. Its totient is φ = 26903568848240.

The previous prime is 40355386516759. The next prime is 40355386516877. The reversal of 40355386516821 is 12861568355304.

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 40355386516821 - 2⁷ = 40355386516693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40355386516321) 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, 683910 + ... + 9009911.

It is an arithmetic number, because the mean of its divisors is an integer number (6725903293548).

Almost surely, 2^{40355386516821} is an apocalyptic number.

It is an amenable number.

40355386516821 is a deficient number, since it is larger than the sum of its proper divisors (13451839831563).

40355386516821 is a wasteful number, since it uses less digits than its factorization.

40355386516821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11081491.

The product of its (nonzero) digits is 20736000, while the sum is 57.

The spelling of 40355386516821 in words is "forty trillion, three hundred fifty-five billion, three hundred eighty-six million, five hundred sixteen thousand, eight hundred twenty-one".