648559554 has 32 divisors (see below), whose sum is σ = 1388871360. Its totient is φ = 201180672.

The previous prime is 648559553. The next prime is 648559577. The reversal of 648559554 is 455955846.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 648559497 and 648559506.

It is not an unprimeable number, because it can be changed into a prime (648559553) 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, 26644 + ... + 44799.

It is an arithmetic number, because the mean of its divisors is an integer number (43402230).

Almost surely, 2^648559554 is an apocalyptic number.

648559554 is an abundant number, since it is smaller than the sum of its proper divisors (740311806).

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

648559554 is a wasteful number, since it uses less digits than its factorization.

648559554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71554.

The product of its digits is 4320000, while the sum is 51.

The square root of 648559554 is about 25466.8324296525. The cubic root of 648559554 is about 865.5987496964.

The spelling of 648559554 in words is "six hundred forty-eight million, five hundred fifty-nine thousand, five hundred fifty-four".