648271719 has 12 divisors (see below), whose sum is σ = 938305992. Its totient is φ = 431298000.

The previous prime is 648271703. The next prime is 648271781. The reversal of 648271719 is 917172846.

It is a happy number.

It is not a de Polignac number, because 648271719 - 2⁴ = 648271703 is a prime.

It is a super-2 number, since 2×648271719² = 840512443310429922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648271219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68932 + ... + 77769.

It is an arithmetic number, because the mean of its divisors is an integer number (78192166).

Almost surely, 2^648271719 is an apocalyptic number.

648271719 is a deficient number, since it is larger than the sum of its proper divisors (290034273).

648271719 is a wasteful number, since it uses less digits than its factorization.

648271719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147198 (or 147195 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 648271719 is about 25461.1806285569. The cubic root of 648271719 is about 865.4706779402.

The spelling of 648271719 in words is "six hundred forty-eight million, two hundred seventy-one thousand, seven hundred nineteen".