90341878132821 has 24 divisors (see below), whose sum is σ = 140122843992480. Its totient is φ = 51623655041952.

The previous prime is 90341878132787. The next prime is 90341878132843. The reversal of 90341878132821 is 12823187814309.

It is a happy number.

It is not a de Polignac number, because 90341878132821 - 2³⁴ = 90324698263637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90341878132321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27812370 + ... + 30890316.

It is an arithmetic number, because the mean of its divisors is an integer number (5838451833020).

Almost surely, 2^{90341878132821} is an apocalyptic number.

It is an amenable number.

90341878132821 is a deficient number, since it is larger than the sum of its proper divisors (49780965859659).

90341878132821 is a wasteful number, since it uses less digits than its factorization.

90341878132821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3277633 (or 3277626 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 90341878132821 in words is "ninety trillion, three hundred forty-one billion, eight hundred seventy-eight million, one hundred thirty-two thousand, eight hundred twenty-one".