172226978802 has 54 divisors (see below), whose sum is σ = 386584306407. Its totient is φ = 55412939232.

The previous prime is 172226978771. The next prime is 172226978813. The reversal of 172226978802 is 208879622271.

It can be written as a sum of positive squares in 5 ways, for example, as 171155136681 + 1071842121 = 413709^2 + 32739^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=293451.

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 26 ways as a sum of consecutive naturals, for example, 51058788 + ... + 51062160.

Almost surely, 2^172226978802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172226978802

172226978802 is an abundant number, since it is smaller than the sum of its proper divisors (214357327605).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172226978802 is an frugal number, since it uses more digits than its factorization.

172226978802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6812 (or 3407 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 172226978802 in words is "one hundred seventy-two billion, two hundred twenty-six million, nine hundred seventy-eight thousand, eight hundred two".