2742523765657 has 4 divisors (see below), whose sum is σ = 2953487132260. Its totient is φ = 2531560399056.

The previous prime is 2742523765633. The next prime is 2742523765679. The reversal of 2742523765657 is 7565673252472.

It is a happy number.

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 735827702416 + 2006696063241 = 857804^2 + 1416579^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2742523765657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2742523765595 and 2742523765604.

It is not an unprimeable number, because it can be changed into a prime (2742523765687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105481683282 + ... + 105481683307.

It is an arithmetic number, because the mean of its divisors is an integer number (738371783065).

Almost surely, 2^{2742523765657} is an apocalyptic number.

It is an amenable number.

2742523765657 is a deficient number, since it is larger than the sum of its proper divisors (210963366603).

2742523765657 is a wasteful number, since it uses less digits than its factorization.

2742523765657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210963366602.

The product of its digits is 148176000, while the sum is 61.

The spelling of 2742523765657 in words is "two trillion, seven hundred forty-two billion, five hundred twenty-three million, seven hundred sixty-five thousand, six hundred fifty-seven".