84420810923646 has 64 divisors (see below), whose sum is σ = 171580157452800. Its totient is φ = 27684930932736.

The previous prime is 84420810923641. The next prime is 84420810923677. The reversal of 84420810923646 is 64632901802448.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84420810923641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2159688070 + ... + 2159727158.

It is an arithmetic number, because the mean of its divisors is an integer number (2680939960200).

Almost surely, 2^{84420810923646} is an apocalyptic number.

84420810923646 is an abundant number, since it is smaller than the sum of its proper divisors (87159346529154).

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

84420810923646 is a wasteful number, since it uses less digits than its factorization.

84420810923646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45873.

The product of its (nonzero) digits is 15925248, while the sum is 57.

The spelling of 84420810923646 in words is "eighty-four trillion, four hundred twenty billion, eight hundred ten million, nine hundred twenty-three thousand, six hundred forty-six".