648796945 has 8 divisors (see below), whose sum is σ = 778743144. Its totient is φ = 518913024.

The previous prime is 648796931. The next prime is 648796957. The reversal of 648796945 is 549697846.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 339001744 + 309795201 = 18412^2 + 17601^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 648796945 - 2²¹ = 646699793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648796945.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11697 + ... + 37873.

It is an arithmetic number, because the mean of its divisors is an integer number (97342893).

Almost surely, 2^648796945 is an apocalyptic number.

It is an amenable number.

648796945 is a deficient number, since it is larger than the sum of its proper divisors (129946199).

648796945 is a wasteful number, since it uses less digits than its factorization.

648796945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31139.

The product of its digits is 13063680, while the sum is 58.

The square root of 648796945 is about 25471.4927909614. The cubic root of 648796945 is about 865.7043479592.

Subtracting from 648796945 its reverse (549697846), we obtain a palindrome (99099099).

It can be divided in two parts, 64879 and 6945, that added together give a square (71824 = 268²).

The spelling of 648796945 in words is "six hundred forty-eight million, seven hundred ninety-six thousand, nine hundred forty-five".