647140855 has 8 divisors (see below), whose sum is σ = 817441200. Its totient is φ = 490464576.

The previous prime is 647140787. The next prime is 647140859. The reversal of 647140855 is 558041746.

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 647140855 - 2¹⁵ = 647108087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647140859) 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, 3405910 + ... + 3406099.

It is an arithmetic number, because the mean of its divisors is an integer number (102180150).

Almost surely, 2^647140855 is an apocalyptic number.

647140855 is a deficient number, since it is larger than the sum of its proper divisors (170300345).

647140855 is a wasteful number, since it uses less digits than its factorization.

647140855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6812033.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 647140855 is about 25438.9633240036. The cubic root of 647140855 is about 864.9671343054.

The spelling of 647140855 in words is "six hundred forty-seven million, one hundred forty thousand, eight hundred fifty-five".