2678734757 has 4 divisors (see below), whose sum is σ = 2681875980. Its totient is φ = 2675593536.

The previous prime is 2678734739. The next prime is 2678734759. The reversal of 2678734757 is 7574378762.

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 244891201 + 2433843556 = 15649^2 + 49334^2 .

It is a cyclic number.

It is not a de Polignac number, because 2678734757 - 2¹² = 2678730661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2678734759) 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, 1569332 + ... + 1571037.

It is an arithmetic number, because the mean of its divisors is an integer number (670468995).

Almost surely, 2^2678734757 is an apocalyptic number.

It is an amenable number.

2678734757 is a deficient number, since it is larger than the sum of its proper divisors (3141223).

2678734757 is an equidigital number, since it uses as much as digits as its factorization.

2678734757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141222.

The product of its digits is 13829760, while the sum is 56.

The square root of 2678734757 is about 51756.4948291516. The cubic root of 2678734757 is about 1388.8112875998.

The spelling of 2678734757 in words is "two billion, six hundred seventy-eight million, seven hundred thirty-four thousand, seven hundred fifty-seven".