84145720456 has 64 divisors (see below), whose sum is σ = 182037934080. Its totient is φ = 35718278400.

The previous prime is 84145720453. The next prime is 84145720487. The reversal of 84145720456 is 65402754148.

It is not an unprimeable number, because it can be changed into a prime (84145720453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4350006 + ... + 4369306.

It is an arithmetic number, because the mean of its divisors is an integer number (2844342720).

Almost surely, 2^84145720456 is an apocalyptic number.

It is an amenable number.

84145720456 is an abundant number, since it is smaller than the sum of its proper divisors (97892213624).

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

84145720456 is a wasteful number, since it uses less digits than its factorization.

84145720456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20054 (or 20050 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 46.

The spelling of 84145720456 in words is "eighty-four billion, one hundred forty-five million, seven hundred twenty thousand, four hundred fifty-six".