6734561257 has 4 divisors (see below), whose sum is σ = 6734846020. Its totient is φ = 6734276496.

The previous prime is 6734561233. The next prime is 6734561263. The reversal of 6734561257 is 7521654376.

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 295461721 + 6439099536 = 17189^2 + 80244^2 .

It is a cyclic number.

It is not a de Polignac number, because 6734561257 - 2⁷ = 6734561129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6734561227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103338 + ... + 155395.

It is an arithmetic number, because the mean of its divisors is an integer number (1683711505).

Almost surely, 2^6734561257 is an apocalyptic number.

It is an amenable number.

6734561257 is a deficient number, since it is larger than the sum of its proper divisors (284763).

6734561257 is a wasteful number, since it uses less digits than its factorization.

6734561257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284762.

The product of its digits is 1058400, while the sum is 46.

The square root of 6734561257 is about 82064.3726412382. The cubic root of 6734561257 is about 1888.4396158647.

The spelling of 6734561257 in words is "six billion, seven hundred thirty-four million, five hundred sixty-one thousand, two hundred fifty-seven".