648778410 has 192 divisors, whose sum is σ = 2047997952. Its totient is φ = 144680256.

The previous prime is 648778409. The next prime is 648778421. The reversal of 648778410 is 14877846.

648778410 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 730987 + ... + 731873.

It is an arithmetic number, because the mean of its divisors is an integer number (10666656).

Almost surely, 2^648778410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648778410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1023998976).

648778410 is an abundant number, since it is smaller than the sum of its proper divisors (1399219542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648778410 is a wasteful number, since it uses less digits than its factorization.

648778410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959 (or 947 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 648778410 is about 25471.1289502448. The cubic root of 648778410 is about 865.6961039917.

The spelling of 648778410 in words is "six hundred forty-eight million, seven hundred seventy-eight thousand, four hundred ten".