672388520049 has 27 divisors (see below), whose sum is σ = 975005430763. Its totient is φ = 446522268192.

The previous prime is 672388519991. The next prime is 672388520053. The reversal of 672388520049 is 940025883276.

The square root of 672388520049 is 819993.

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

672388520049 is a `hidden beast` number, since 6 + 72 + 3 + 8 + 8 + 520 + 0 + 49 = 666.

672388520049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 19472807025 + 652915713024 = 139545^2 + 808032^2 .

It is not a de Polignac number, because 672388520049 - 2⁷ = 672388519921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 672388519977 and 672388520004.

It is not an unprimeable number, because it can be changed into a prime (672388520059) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1089770389 + ... + 1089771005.

Almost surely, 2^672388520049 is an apocalyptic number.

672388520049 is the 819993-rd square number.

672388520049 is the 409997-th centered octagonal number.

It is an amenable number.

672388520049 is a deficient number, since it is larger than the sum of its proper divisors (302616910714).

672388520049 is an frugal number, since it uses more digits than its factorization.

672388520049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126 (or 1063 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 672388520049 in words is "six hundred seventy-two billion, three hundred eighty-eight million, five hundred twenty thousand, forty-nine".