671523496745 has 4 divisors (see below), whose sum is σ = 805828196100. Its totient is φ = 537218797392.

The previous prime is 671523496739. The next prime is 671523496757. The reversal of 671523496745 is 547694325176.

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 459721968784 + 211801527961 = 678028^2 + 460219^2 .

It is a cyclic number.

It is not a de Polignac number, because 671523496745 - 2²⁴ = 671506719529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67152349670 + ... + 67152349679.

It is an arithmetic number, because the mean of its divisors is an integer number (201457049025).

Almost surely, 2^671523496745 is an apocalyptic number.

It is an amenable number.

671523496745 is a deficient number, since it is larger than the sum of its proper divisors (134304699355).

671523496745 is a wasteful number, since it uses less digits than its factorization.

671523496745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134304699354.

The product of its digits is 38102400, while the sum is 59.

The spelling of 671523496745 in words is "six hundred seventy-one billion, five hundred twenty-three million, four hundred ninety-six thousand, seven hundred forty-five".