6725137106609 has 4 divisors (see below), whose sum is σ = 6881535644016. Its totient is φ = 6568738569204.

The previous prime is 6725137106581. The next prime is 6725137106671. The reversal of 6725137106609 is 9066017315276.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6725137106609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6725137106309) 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, 78199268639 + ... + 78199268724.

It is an arithmetic number, because the mean of its divisors is an integer number (1720383911004).

Almost surely, 2^{6725137106609} is an apocalyptic number.

It is an amenable number.

6725137106609 is a deficient number, since it is larger than the sum of its proper divisors (156398537407).

6725137106609 is a wasteful number, since it uses less digits than its factorization.

6725137106609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156398537406.

The product of its (nonzero) digits is 2857680, while the sum is 53.

The spelling of 6725137106609 in words is "six trillion, seven hundred twenty-five billion, one hundred thirty-seven million, one hundred six thousand, six hundred nine".