6858136465 has 8 divisors (see below), whose sum is σ = 8237615400. Its totient is φ = 5481274752.

The previous prime is 6858136463. The next prime is 6858136477. The reversal of 6858136465 is 5646318586.

It can be written as a sum of positive squares in 4 ways, for example, as 321090561 + 6537045904 = 17919^2 + 80852^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6858136465 - 2¹ = 6858136463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6858136463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 648534 + ... + 659023.

It is an arithmetic number, because the mean of its divisors is an integer number (1029701925).

Almost surely, 2^6858136465 is an apocalyptic number.

It is an amenable number.

6858136465 is a deficient number, since it is larger than the sum of its proper divisors (1379478935).

6858136465 is a wasteful number, since it uses less digits than its factorization.

6858136465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308611.

The product of its digits is 4147200, while the sum is 52.

The square root of 6858136465 is about 82813.8663811804. The cubic root of 6858136465 is about 1899.9202611965.

The spelling of 6858136465 in words is "six billion, eight hundred fifty-eight million, one hundred thirty-six thousand, four hundred sixty-five".