84778472652 has 24 divisors (see below), whose sum is σ = 197821440432. Its totient is φ = 28258776000.

The previous prime is 84778472593. The next prime is 84778472657. The reversal of 84778472652 is 25627487748.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (84778472657) 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 7 ways as a sum of consecutive naturals, for example, 648402 + ... + 768102.

It is an arithmetic number, because the mean of its divisors is an integer number (8242560018).

Almost surely, 2^84778472652 is an apocalyptic number.

It is an amenable number.

84778472652 is an abundant number, since it is smaller than the sum of its proper divisors (113042967780).

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

84778472652 is a wasteful number, since it uses less digits than its factorization.

84778472652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178729 (or 178727 counting only the distinct ones).

The product of its digits is 42147840, while the sum is 60.

The spelling of 84778472652 in words is "eighty-four billion, seven hundred seventy-eight million, four hundred seventy-two thousand, six hundred fifty-two".