647406055 has 4 divisors (see below), whose sum is σ = 776887272. Its totient is φ = 517924840.

The previous prime is 647405987. The next prime is 647406083. The reversal of 647406055 is 550604746.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550604746 = 2 ⋅275302373.

It is not a de Polignac number, because 647406055 - 2²³ = 639017447 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 64740601 + ... + 64740610.

It is an arithmetic number, because the mean of its divisors is an integer number (194221818).

Almost surely, 2^647406055 is an apocalyptic number.

647406055 is a deficient number, since it is larger than the sum of its proper divisors (129481217).

647406055 is a wasteful number, since it uses less digits than its factorization.

647406055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129481216.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 647406055 is about 25444.1752666499. The cubic root of 647406055 is about 865.0852734270.

The spelling of 647406055 in words is "six hundred forty-seven million, four hundred six thousand, fifty-five".