2572616709 has 48 divisors (see below), whose sum is σ = 4241044080. Its totient is φ = 1491194880.

The previous prime is 2572616693. The next prime is 2572616731. The reversal of 2572616709 is 9076162752.

2572616709 is a `hidden beast` number, since 2 + 572 + 6 + 1 + 6 + 70 + 9 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 619860609 + 1952756100 = 24897^2 + 44190^2 .

It is not a de Polignac number, because 2572616709 - 2⁴ = 2572616693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2572616779) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 129867 + ... + 148359.

It is an arithmetic number, because the mean of its divisors is an integer number (88355085).

Almost surely, 2^2572616709 is an apocalyptic number.

2572616709 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2572616709 is a deficient number, since it is larger than the sum of its proper divisors (1668427371).

2572616709 is a wasteful number, since it uses less digits than its factorization.

2572616709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18582 (or 18579 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 2572616709 is about 50720.9691252050. The cubic root of 2572616709 is about 1370.2243951972.

The spelling of 2572616709 in words is "two billion, five hundred seventy-two million, six hundred sixteen thousand, seven hundred nine".