672226171236 has 27 divisors (see below), whose sum is σ = 1699250812441. Its totient is φ = 224073750624.

The previous prime is 672226171223. The next prime is 672226171237. The reversal of 672226171236 is 632171622276.

The square root of 672226171236 is 819894.

It is a perfect power (a square), and thus also a powerful number.

672226171236 is a `hidden beast` number, since 6 + 7 + 2 + 2 + 2 + 617 + 1 + 23 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 648337377636 + 23888793600 = 805194^2 + 154560^2 .

It is a super-2 number, since 2×672226171236² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 672226171191 and 672226171200.

It is not an unprimeable number, because it can be changed into a prime (672226171237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4851040 + ... + 4987688.

Almost surely, 2^672226171236 is an apocalyptic number.

672226171236 is the 819894-th square number.

It is an amenable number.

672226171236 is an abundant number, since it is smaller than the sum of its proper divisors (1027024641205).

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

672226171236 is an frugal number, since it uses more digits than its factorization.

672226171236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273308 (or 136654 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The spelling of 672226171236 in words is "six hundred seventy-two billion, two hundred twenty-six million, one hundred seventy-one thousand, two hundred thirty-six".