672268806399 has 32 divisors (see below), whose sum is σ = 929198233600. Its totient is φ = 431885260800.

The previous prime is 672268806379. The next prime is 672268806401. The reversal of 672268806399 is 993608862276.

It is a happy number.

It is a Cunningham number, because it is equal to 819920²-1.

It is not a de Polignac number, because 672268806399 - 2⁵ = 672268806367 is a prime.

It is a super-2 number, since 2×672268806399² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672268806329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25404327 + ... + 25430775.

It is an arithmetic number, because the mean of its divisors is an integer number (29037444800).

Almost surely, 2^672268806399 is an apocalyptic number.

672268806399 is a deficient number, since it is larger than the sum of its proper divisors (256929427201).

672268806399 is a wasteful number, since it uses less digits than its factorization.

672268806399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27631.

The product of its (nonzero) digits is 94058496, while the sum is 66.

The spelling of 672268806399 in words is "six hundred seventy-two billion, two hundred sixty-eight million, eight hundred six thousand, three hundred ninety-nine".