647006855 has 32 divisors (see below), whose sum is σ = 870912000. Its totient is φ = 457350400.

The previous prime is 647006839. The next prime is 647006861. The reversal of 647006855 is 558600746.

It is not a de Polignac number, because 647006855 - 2⁴ = 647006839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1079846 + ... + 1080444.

It is an arithmetic number, because the mean of its divisors is an integer number (27216000).

Almost surely, 2^647006855 is an apocalyptic number.

647006855 is a deficient number, since it is larger than the sum of its proper divisors (223905145).

647006855 is a wasteful number, since it uses less digits than its factorization.

647006855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 647006855 is about 25436.3294325262. The cubic root of 647006855 is about 864.9074288096.

The spelling of 647006855 in words is "six hundred forty-seven million, six thousand, eight hundred fifty-five".