84378512072 has 16 divisors (see below), whose sum is σ = 159124219740. Its totient is φ = 41945386816.

The previous prime is 84378512069. The next prime is 84378512081. The reversal of 84378512072 is 27021587348.

It can be written as a sum of positive squares in 2 ways, for example, as 75760360516 + 8618151556 = 275246^2 + 92834^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 30482183 + ... + 30484950.

Almost surely, 2^84378512072 is an apocalyptic number.

It is an amenable number.

84378512072 is a deficient number, since it is larger than the sum of its proper divisors (74745707668).

84378512072 is a wasteful number, since it uses less digits than its factorization.

84378512072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60967312 (or 60967308 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 47.

The spelling of 84378512072 in words is "eighty-four billion, three hundred seventy-eight million, five hundred twelve thousand, seventy-two".