2757509078981 has 2 divisors, whose sum is σ = 2757509078982. Its totient is φ = 2757509078980.

The previous prime is 2757509078969. The next prime is 2757509078983. The reversal of 2757509078981 is 1898709057572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2609291008900 + 148218070081 = 1615330^2 + 384991^2 .

It is a cyclic number.

It is not a de Polignac number, because 2757509078981 - 2⁶ = 2757509078917 is a prime.

It is a super-2 number, since 2×2757509078981² (a number of 26 digits) contains 22 as substring.

Together with 2757509078983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2757509078983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1378754539490 + 1378754539491.

It is an arithmetic number, because the mean of its divisors is an integer number (1378754539491).

Almost surely, 2^{2757509078981} is an apocalyptic number.

It is an amenable number.

2757509078981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2757509078981 is an equidigital number, since it uses as much as digits as its factorization.

2757509078981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88905600, while the sum is 68.

The spelling of 2757509078981 in words is "two trillion, seven hundred fifty-seven billion, five hundred nine million, seventy-eight thousand, nine hundred eighty-one".