648517156 has 81 divisors (see below), whose sum is σ = 1415651601. Its totient is φ = 259142016.

The previous prime is 648517153. The next prime is 648517157. The reversal of 648517156 is 651715846.

The square root of 648517156 is 25466.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 504900900 + 143616256 = 22470^2 + 11984^2 .

It is not an unprimeable number, because it can be changed into a prime (648517153) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6060855 + ... + 6060961.

Almost surely, 2^648517156 is an apocalyptic number.

648517156 is the 25466-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648517156

648517156 is an abundant number, since it is smaller than the sum of its proper divisors (767134445).

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

648517156 is a wasteful number, since it uses less digits than its factorization.

648517156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 133 counting only the distinct ones).

The product of its digits is 201600, while the sum is 43.

The cubic root of 648517156 is about 865.5798871492.

The spelling of 648517156 in words is "six hundred forty-eight million, five hundred seventeen thousand, one hundred fifty-six".