8783481205821 has 8 divisors (see below), whose sum is σ = 13384352313664. Its totient is φ = 5019132117600.

The previous prime is 8783481205819. The next prime is 8783481205883. The reversal of 8783481205821 is 1285021843878.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8783481205821 - 2¹ = 8783481205819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8783481205021) 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, 209130504880 + ... + 209130504921.

It is an arithmetic number, because the mean of its divisors is an integer number (1673044039208).

Almost surely, 2^{8783481205821} is an apocalyptic number.

It is an amenable number.

8783481205821 is a deficient number, since it is larger than the sum of its proper divisors (4600871107843).

8783481205821 is a wasteful number, since it uses less digits than its factorization.

8783481205821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418261009811.

The product of its (nonzero) digits is 6881280, while the sum is 57.

The spelling of 8783481205821 in words is "eight trillion, seven hundred eighty-three billion, four hundred eighty-one million, two hundred five thousand, eight hundred twenty-one".