84521591662 has 4 divisors (see below), whose sum is σ = 126782387496. Its totient is φ = 42260795830.

The previous prime is 84521591641. The next prime is 84521591669. The reversal of 84521591662 is 26619512548.

It is a happy number.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84521591669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21130397914 + ... + 21130397917.

It is an arithmetic number, because the mean of its divisors is an integer number (31695596874).

Almost surely, 2^84521591662 is an apocalyptic number.

84521591662 is a deficient number, since it is larger than the sum of its proper divisors (42260795834).

84521591662 is a wasteful number, since it uses less digits than its factorization.

84521591662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42260795833.

The product of its digits is 1036800, while the sum is 49.

The spelling of 84521591662 in words is "eighty-four billion, five hundred twenty-one million, five hundred ninety-one thousand, six hundred sixty-two".