2897772543909 has 6 divisors (see below), whose sum is σ = 4185671452326. Its totient is φ = 1931848362600.

The previous prime is 2897772543907. The next prime is 2897772543937. The reversal of 2897772543909 is 9093452777982.

2897772543909 is a `hidden beast` number, since 2 + 8 + 9 + 7 + 7 + 72 + 543 + 9 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1708588836900 + 1189183707009 = 1307130^2 + 1090497^2 .

It is not a de Polignac number, because 2897772543909 - 2¹ = 2897772543907 is a prime.

It is a super-3 number, since 3×2897772543909³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2897772543907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 160987363542 + ... + 160987363559.

It is an arithmetic number, because the mean of its divisors is an integer number (697611908721).

Almost surely, 2^{2897772543909} is an apocalyptic number.

It is an amenable number.

2897772543909 is a deficient number, since it is larger than the sum of its proper divisors (1287898908417).

2897772543909 is a wasteful number, since it uses less digits than its factorization.

2897772543909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321974727107 (or 321974727104 counting only the distinct ones).

The product of its (nonzero) digits is 480090240, while the sum is 72.

The spelling of 2897772543909 in words is "two trillion, eight hundred ninety-seven billion, seven hundred seventy-two million, five hundred forty-three thousand, nine hundred nine".