672043545 has 24 divisors (see below), whose sum is σ = 1165913736. Its totient is φ = 358103808.

The previous prime is 672043511. The next prime is 672043577. The reversal of 672043545 is 545340276.

672043545 is a `hidden beast` number, since 6 + 72 + 0 + 43 + 545 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11964681 + 660078864 = 3459^2 + 25692^2 .

It is not a de Polignac number, because 672043545 - 2²¹ = 669946393 is a prime.

It is a super-3 number, since 3×672043545³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49629 + ... + 61701.

It is an arithmetic number, because the mean of its divisors is an integer number (48579739).

Almost surely, 2^672043545 is an apocalyptic number.

It is an amenable number.

672043545 is a deficient number, since it is larger than the sum of its proper divisors (493870191).

672043545 is a wasteful number, since it uses less digits than its factorization.

672043545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13321 (or 13318 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The square root of 672043545 is about 25923.8026724476. The cubic root of 672043545 is about 875.9227468309.

The spelling of 672043545 in words is "six hundred seventy-two million, forty-three thousand, five hundred forty-five".