647774125 has 32 divisors (see below), whose sum is σ = 854680320. Its totient is φ = 488808000.

The previous prime is 647774119. The next prime is 647774143. The reversal of 647774125 is 521477746.

It is not a de Polignac number, because 647774125 - 2³ = 647774117 is a prime.

It is a super-2 number, since 2×647774125² = 839222634039031250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 738187 + ... + 739063.

It is an arithmetic number, because the mean of its divisors is an integer number (26708760).

Almost surely, 2^647774125 is an apocalyptic number.

It is an amenable number.

647774125 is a deficient number, since it is larger than the sum of its proper divisors (206906195).

647774125 is a wasteful number, since it uses less digits than its factorization.

647774125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222 (or 1212 counting only the distinct ones).

The product of its digits is 329280, while the sum is 43.

The square root of 647774125 is about 25451.4071320232. The cubic root of 647774125 is about 865.2491847831.

The spelling of 647774125 in words is "six hundred forty-seven million, seven hundred seventy-four thousand, one hundred twenty-five".