84072945778 has 8 divisors (see below), whose sum is σ = 126351472860. Its totient is φ = 41955788160.

The previous prime is 84072945727. The next prime is 84072945811. The reversal of 84072945778 is 87754927048.

It can be written as a sum of positive squares in 2 ways, for example, as 64809448929 + 19263496849 = 254577^2 + 138793^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40341063 + ... + 40343146.

Almost surely, 2^84072945778 is an apocalyptic number.

84072945778 is a deficient number, since it is larger than the sum of its proper divisors (42278527082).

84072945778 is a wasteful number, since it uses less digits than its factorization.

84072945778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80684732.

The product of its (nonzero) digits is 31610880, while the sum is 61.

The spelling of 84072945778 in words is "eighty-four billion, seventy-two million, nine hundred forty-five thousand, seven hundred seventy-eight".