647078145 has 32 divisors (see below), whose sum is σ = 1184671488. Its totient is φ = 295446528.

The previous prime is 647078141. The next prime is 647078153. The reversal of 647078145 is 541870746.

It is not a de Polignac number, because 647078145 - 2² = 647078141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 647078097 and 647078106.

It is not an unprimeable number, because it can be changed into a prime (647078141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95097 + ... + 101673.

It is an arithmetic number, because the mean of its divisors is an integer number (37020984).

Almost surely, 2^647078145 is an apocalyptic number.

It is an amenable number.

647078145 is a deficient number, since it is larger than the sum of its proper divisors (537593343).

647078145 is a wasteful number, since it uses less digits than its factorization.

647078145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7529.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 647078145 is about 25437.7307360543. The cubic root of 647078145 is about 864.9391940506.

The spelling of 647078145 in words is "six hundred forty-seven million, seventy-eight thousand, one hundred forty-five".