2671245721657 has 8 divisors (see below), whose sum is σ = 2715344375040. Its totient is φ = 2627404203840.

The previous prime is 2671245721631. The next prime is 2671245721663. The reversal of 2671245721657 is 7561275421762.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2671245721657 - 2¹¹ = 2671245719609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2671245721598 and 2671245721607.

It is not an unprimeable number, because it can be changed into a prime (2671245725657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64262944 + ... + 64304497.

It is an arithmetic number, because the mean of its divisors is an integer number (339418046880).

Almost surely, 2^{2671245721657} is an apocalyptic number.

It is an amenable number.

2671245721657 is a deficient number, since it is larger than the sum of its proper divisors (44098653383).

2671245721657 is a wasteful number, since it uses less digits than its factorization.

2671245721657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128567783.

The product of its digits is 9878400, while the sum is 55.

The spelling of 2671245721657 in words is "two trillion, six hundred seventy-one billion, two hundred forty-five million, seven hundred twenty-one thousand, six hundred fifty-seven".