647263485 has 36 divisors (see below), whose sum is σ = 1233198876. Its totient is φ = 313822080.

The previous prime is 647263471. The next prime is 647263517. The reversal of 647263485 is 584362746.

647263485 is a `hidden beast` number, since 6 + 4 + 7 + 2 + 634 + 8 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 355058649 + 292204836 = 18843^2 + 17094^2 .

It is not a de Polignac number, because 647263485 - 2²⁶ = 580154621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 647263485.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 53992 + ... + 64881.

Almost surely, 2^647263485 is an apocalyptic number.

It is an amenable number.

647263485 is a deficient number, since it is larger than the sum of its proper divisors (585935391).

647263485 is a wasteful number, since it uses less digits than its factorization.

647263485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118906 (or 118892 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The square root of 647263485 is about 25441.3734888665. The cubic root of 647263485 is about 865.0217665232.

The spelling of 647263485 in words is "six hundred forty-seven million, two hundred sixty-three thousand, four hundred eighty-five".