2570720464661 has 4 divisors (see below), whose sum is σ = 2570724720300. Its totient is φ = 2570716209024.

The previous prime is 2570720464591. The next prime is 2570720464673. The reversal of 2570720464661 is 1664640270752.

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 2332703327761 + 238017136900 = 1527319^2 + 487870^2 .

It is a cyclic number.

It is not a de Polignac number, because 2570720464661 - 2¹⁸ = 2570720202517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2570720464681) 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, 1034426 + ... + 2492283.

It is an arithmetic number, because the mean of its divisors is an integer number (642681180075).

Almost surely, 2^{2570720464661} is an apocalyptic number.

It is an amenable number.

2570720464661 is a deficient number, since it is larger than the sum of its proper divisors (4255639).

2570720464661 is an equidigital number, since it uses as much as digits as its factorization.

2570720464661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4255638.

The product of its (nonzero) digits is 3386880, while the sum is 50.

The spelling of 2570720464661 in words is "two trillion, five hundred seventy billion, seven hundred twenty million, four hundred sixty-four thousand, six hundred sixty-one".