84641421278 has 16 divisors (see below), whose sum is σ = 137556785520. Its totient is φ = 38904948096.

The previous prime is 84641421251. The next prime is 84641421283. The reversal of 84641421278 is 87212414648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28945673 + ... + 28948596.

It is an arithmetic number, because the mean of its divisors is an integer number (8597299095).

Almost surely, 2^84641421278 is an apocalyptic number.

84641421278 is a deficient number, since it is larger than the sum of its proper divisors (52915364242).

84641421278 is a wasteful number, since it uses less digits than its factorization.

84641421278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57894331.

The product of its digits is 688128, while the sum is 47.

The spelling of 84641421278 in words is "eighty-four billion, six hundred forty-one million, four hundred twenty-one thousand, two hundred seventy-eight".