647540055 has 16 divisors (see below), whose sum is σ = 1151182560. Its totient is φ = 345354624.

The previous prime is 647540051. The next prime is 647540099. The reversal of 647540055 is 550045746.

It is a happy number.

647540055 is a `hidden beast` number, since 64 + 7 + 540 + 0 + 55 = 666.

It is not a de Polignac number, because 647540055 - 2² = 647540051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647540051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2398162 + ... + 2398431.

It is an arithmetic number, because the mean of its divisors is an integer number (71948910).

Almost surely, 2^647540055 is an apocalyptic number.

647540055 is a deficient number, since it is larger than the sum of its proper divisors (503642505).

647540055 is a wasteful number, since it uses less digits than its factorization.

647540055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4796607 (or 4796601 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 647540055 is about 25446.8083460382. The cubic root of 647540055 is about 865.1449543793.

The spelling of 647540055 in words is "six hundred forty-seven million, five hundred forty thousand, fifty-five".