672702716545 has 4 divisors (see below), whose sum is σ = 807243259860. Its totient is φ = 538162173232.

The previous prime is 672702716509. The next prime is 672702716549. The reversal of 672702716545 is 545617207276.

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 537118957456 + 135583759089 = 732884^2 + 368217^2 .

It is a cyclic number.

It is not a de Polignac number, because 672702716545 - 2²⁹ = 672165845633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 672702716492 and 672702716501.

It is not an unprimeable number, because it can be changed into a prime (672702716549) 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, 67270271650 + ... + 67270271659.

It is an arithmetic number, because the mean of its divisors is an integer number (201810814965).

Almost surely, 2^672702716545 is an apocalyptic number.

It is an amenable number.

672702716545 is a deficient number, since it is larger than the sum of its proper divisors (134540543315).

672702716545 is a wasteful number, since it uses less digits than its factorization.

672702716545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134540543314.

The product of its (nonzero) digits is 4939200, while the sum is 52.

The spelling of 672702716545 in words is "six hundred seventy-two billion, seven hundred two million, seven hundred sixteen thousand, five hundred forty-five".