647872755 has 16 divisors (see below), whose sum is σ = 1041168384. Its totient is φ = 344008160.

The previous prime is 647872733. The next prime is 647872777. The reversal of 647872755 is 557278746.

It is an interprime number because it is at equal distance from previous prime (647872733) and next prime (647872777).

It is not a de Polignac number, because 647872755 - 2⁵ = 647872723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 647872698 and 647872707.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91731 + ... + 98540.

It is an arithmetic number, because the mean of its divisors is an integer number (65073024).

Almost surely, 2^647872755 is an apocalyptic number.

647872755 is a deficient number, since it is larger than the sum of its proper divisors (393295629).

647872755 is a wasteful number, since it uses less digits than its factorization.

647872755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190506.

The product of its digits is 3292800, while the sum is 51.

The square root of 647872755 is about 25453.3446721644. The cubic root of 647872755 is about 865.2930967955.

The spelling of 647872755 in words is "six hundred forty-seven million, eight hundred seventy-two thousand, seven hundred fifty-five".