2570721602409 has 27 divisors (see below), whose sum is σ = 3723499020189. Its totient is φ = 1709103768120.

The previous prime is 2570721602359. The next prime is 2570721602437. The reversal of 2570721602409 is 9042061270752.

The square root of 2570721602409 is 1603347.

It is a perfect power (a square), and thus also a powerful number.

2570721602409 is a `hidden beast` number, since 2 + 570 + 72 + 1 + 6 + 0 + 2 + 4 + 0 + 9 = 666.

It is not a de Polignac number, because 2570721602409 - 2¹⁵ = 2570721569641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2570721602489) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3169816614 + ... + 3169817424.

Almost surely, 2^{2570721602409} is an apocalyptic number.

2570721602409 is the 1603347-th square number.

2570721602409 is the 801674-th centered octagonal number.

It is an amenable number.

2570721602409 is a deficient number, since it is larger than the sum of its proper divisors (1152777417780).

2570721602409 is an frugal number, since it uses more digits than its factorization.

2570721602409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946 (or 1473 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 2570721602409 in words is "two trillion, five hundred seventy billion, seven hundred twenty-one million, six hundred two thousand, four hundred nine".