671736579049 has 16 divisors (see below), whose sum is σ = 692295978816. Its totient is φ = 651307608000.

The previous prime is 671736579013. The next prime is 671736579061. The reversal of 671736579049 is 940975637176.

It is a cyclic number.

It is not a de Polignac number, because 671736579049 - 2⁷ = 671736578921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671736579149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12708694 + ... + 12761440.

It is an arithmetic number, because the mean of its divisors is an integer number (43268498676).

Almost surely, 2^671736579049 is an apocalyptic number.

It is an amenable number.

671736579049 is a deficient number, since it is larger than the sum of its proper divisors (20559399767).

671736579049 is a wasteful number, since it uses less digits than its factorization.

671736579049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53976.

The product of its (nonzero) digits is 60011280, while the sum is 64.

The spelling of 671736579049 in words is "six hundred seventy-one billion, seven hundred thirty-six million, five hundred seventy-nine thousand, forty-nine".