84722921522 has 18 divisors (see below), whose sum is σ = 135010823997. Its totient is φ = 39866317024.

The previous prime is 84722921473. The next prime is 84722921531. The reversal of 84722921522 is 22512922748.

It can be written as a sum of positive squares in 2 ways, for example, as 77540528521 + 7182393001 = 278461^2 + 84749^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=205819.

It is a Duffinian number.

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 8 ways as a sum of consecutive naturals, for example, 6991793 + ... + 7003899.

Almost surely, 2^84722921522 is an apocalyptic number.

84722921522 is a deficient number, since it is larger than the sum of its proper divisors (50287902475).

84722921522 is an frugal number, since it uses more digits than its factorization.

84722921522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24250 (or 12126 counting only the distinct ones).

The product of its digits is 322560, while the sum is 44.

The spelling of 84722921522 in words is "eighty-four billion, seven hundred twenty-two million, nine hundred twenty-one thousand, five hundred twenty-two".