648620544 has 160 divisors (see below), whose sum is σ = 2030745024. Its totient is φ = 181370880.

The previous prime is 648620543. The next prime is 648620551. The reversal of 648620544 is 445026846.

It is a super-2 number, since 2×648620544² = 841417220197711872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (648620543) 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, 218172 + ... + 221124.

Almost surely, 2^648620544 is an apocalyptic number.

648620544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648620544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1015372512).

648620544 is an abundant number, since it is smaller than the sum of its proper divisors (1382124480).

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

648620544 is a wasteful number, since it uses less digits than its factorization.

648620544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998 (or 2982 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 39.

The square root of 648620544 is about 25468.0298413521. The cubic root of 648620544 is about 865.6258822409.

The spelling of 648620544 in words is "six hundred forty-eight million, six hundred twenty thousand, five hundred forty-four".