647676355 has 4 divisors (see below), whose sum is σ = 777211632. Its totient is φ = 518141080.

The previous prime is 647676311. The next prime is 647676371. The reversal of 647676355 is 553676746.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 647676355 - 2¹⁵ = 647643587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647676299 and 647676308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64767631 + ... + 64767640.

It is an arithmetic number, because the mean of its divisors is an integer number (194302908).

Almost surely, 2^647676355 is an apocalyptic number.

647676355 is a deficient number, since it is larger than the sum of its proper divisors (129535277).

647676355 is a wasteful number, since it uses less digits than its factorization.

647676355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129535276.

The product of its digits is 3175200, while the sum is 49.

The square root of 647676355 is about 25449.4863405924. The cubic root of 647676355 is about 865.2056512602.

The spelling of 647676355 in words is "six hundred forty-seven million, six hundred seventy-six thousand, three hundred fifty-five".