648181490 has 16 divisors (see below), whose sum is σ = 1272792960. Its totient is φ = 235702320.

The previous prime is 648181489. The next prime is 648181531. The reversal of 648181490 is 94181846.

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, 2946170 + ... + 2946389.

It is an arithmetic number, because the mean of its divisors is an integer number (79549560).

Almost surely, 2^648181490 is an apocalyptic number.

648181490 is a deficient number, since it is larger than the sum of its proper divisors (624611470).

648181490 is a wasteful number, since it uses less digits than its factorization.

648181490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5892577.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 648181490 is about 25459.4086734158. The cubic root of 648181490 is about 865.4305228762.

The spelling of 648181490 in words is "six hundred forty-eight million, one hundred eighty-one thousand, four hundred ninety".