84181355963 has 4 divisors (see below), whose sum is σ = 85769683488. Its totient is φ = 82593028440.

The previous prime is 84181355959. The next prime is 84181355981. The reversal of 84181355963 is 36955318148.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84181355963 - 2² = 84181355959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 1588327471 = 84181355963 / (8 + 4 + 1 + 8 + 1 + 3 + 5 + 5 + 9 + 6 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84181355953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794163683 + ... + 794163788.

It is an arithmetic number, because the mean of its divisors is an integer number (21442420872).

Almost surely, 2^84181355963 is an apocalyptic number.

84181355963 is a deficient number, since it is larger than the sum of its proper divisors (1588327525).

84181355963 is a wasteful number, since it uses less digits than its factorization.

84181355963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588327524.

The product of its digits is 3110400, while the sum is 53.

The spelling of 84181355963 in words is "eighty-four billion, one hundred eighty-one million, three hundred fifty-five thousand, nine hundred sixty-three".