648693718 has 32 divisors (see below), whose sum is σ = 1077971328. Its totient is φ = 291456000.

The previous prime is 648693709. The next prime is 648693719. The reversal of 648693718 is 817396846.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648693719) 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, 60568 + ... + 70468.

It is an arithmetic number, because the mean of its divisors is an integer number (33686604).

Almost surely, 2^648693718 is an apocalyptic number.

648693718 is a deficient number, since it is larger than the sum of its proper divisors (429277610).

648693718 is a wasteful number, since it uses less digits than its factorization.

648693718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10008.

The product of its digits is 1741824, while the sum is 52.

The square root of 648693718 is about 25469.4663862437. The cubic root of 648693718 is about 865.6584328218.

The spelling of 648693718 in words is "six hundred forty-eight million, six hundred ninety-three thousand, seven hundred eighteen".