2749428969779 has 4 divisors (see below), whose sum is σ = 2759144266776. Its totient is φ = 2739713672784.

The previous prime is 2749428969743. The next prime is 2749428969829. The reversal of 2749428969779 is 9779698249472.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2749428969779 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2749428969697 and 2749428969706.

It is not an unprimeable number, because it can be changed into a prime (2749428969709) 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, 4857648074 + ... + 4857648639.

It is an arithmetic number, because the mean of its divisors is an integer number (689786066694).

Almost surely, 2^{2749428969779} is an apocalyptic number.

2749428969779 is a deficient number, since it is larger than the sum of its proper divisors (9715296997).

2749428969779 is an equidigital number, since it uses as much as digits as its factorization.

2749428969779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9715296996.

The product of its digits is 6913299456, while the sum is 83.

The spelling of 2749428969779 in words is "two trillion, seven hundred forty-nine billion, four hundred twenty-eight million, nine hundred sixty-nine thousand, seven hundred seventy-nine".