84721415806 has 4 divisors (see below), whose sum is σ = 127082123712. Its totient is φ = 42360707902.

The previous prime is 84721415797. The next prime is 84721415813. The reversal of 84721415806 is 60851412748.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21180353950 + ... + 21180353953.

It is an arithmetic number, because the mean of its divisors is an integer number (31770530928).

Almost surely, 2^84721415806 is an apocalyptic number.

84721415806 is a deficient number, since it is larger than the sum of its proper divisors (42360707906).

84721415806 is a wasteful number, since it uses less digits than its factorization.

84721415806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42360707905.

The product of its (nonzero) digits is 430080, while the sum is 46.

The spelling of 84721415806 in words is "eighty-four billion, seven hundred twenty-one million, four hundred fifteen thousand, eight hundred six".