648849277 has 16 divisors (see below), whose sum is σ = 680238000. Its totient is φ = 618118144.

The previous prime is 648849203. The next prime is 648849281. The reversal of 648849277 is 772948846.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 50851161 + 597998116 = 7131^2 + 24454^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648849277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648849077) 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, 1274499 + ... + 1275007.

It is an arithmetic number, because the mean of its divisors is an integer number (42514875).

Almost surely, 2^648849277 is an apocalyptic number.

It is an amenable number.

648849277 is a deficient number, since it is larger than the sum of its proper divisors (31388723).

648849277 is a wasteful number, since it uses less digits than its factorization.

648849277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040.

The product of its digits is 5419008, while the sum is 55.

The square root of 648849277 is about 25472.5200363058. The cubic root of 648849277 is about 865.7276232548.

The spelling of 648849277 in words is "six hundred forty-eight million, eight hundred forty-nine thousand, two hundred seventy-seven".