672529805881 has 2 divisors, whose sum is σ = 672529805882. Its totient is φ = 672529805880.

The previous prime is 672529805839. The next prime is 672529805953. The reversal of 672529805881 is 188508925276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 612800889856 + 59728916025 = 782816^2 + 244395^2 .

It is a cyclic number.

It is not a de Polignac number, because 672529805881 - 2²¹ = 672527708729 is a prime.

It is a super-2 number, since 2×672529805881² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (672529805081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336264902940 + 336264902941.

It is an arithmetic number, because the mean of its divisors is an integer number (336264902941).

Almost surely, 2^672529805881 is an apocalyptic number.

It is an amenable number.

672529805881 is a deficient number, since it is larger than the sum of its proper divisors (1).

672529805881 is an equidigital number, since it uses as much as digits as its factorization.

672529805881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19353600, while the sum is 61.

The spelling of 672529805881 in words is "six hundred seventy-two billion, five hundred twenty-nine million, eight hundred five thousand, eight hundred eighty-one".