672889511729 has 4 divisors (see below), whose sum is σ = 672895706484. Its totient is φ = 672883316976.

The previous prime is 672889511699. The next prime is 672889511741. The reversal of 672889511729 is 927115988276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 220467811600 + 452421700129 = 469540^2 + 672623^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672889511729 is a prime.

It is a super-3 number, since 3×672889511729³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672889513729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2931482 + ... + 3152675.

It is an arithmetic number, because the mean of its divisors is an integer number (168223926621).

Almost surely, 2^672889511729 is an apocalyptic number.

It is an amenable number.

672889511729 is a deficient number, since it is larger than the sum of its proper divisors (6194755).

672889511729 is a wasteful number, since it uses less digits than its factorization.

672889511729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6194754.

The product of its digits is 30481920, while the sum is 65.

The spelling of 672889511729 in words is "six hundred seventy-two billion, eight hundred eighty-nine million, five hundred eleven thousand, seven hundred twenty-nine".