648620486 has 4 divisors (see below), whose sum is σ = 972930732. Its totient is φ = 324310242.

The previous prime is 648620459. The next prime is 648620491. The reversal of 648620486 is 684026846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 684026846 = 2 ⋅342013423.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162155120 + ... + 162155123.

It is an arithmetic number, because the mean of its divisors is an integer number (243232683).

Almost surely, 2^648620486 is an apocalyptic number.

648620486 is a deficient number, since it is larger than the sum of its proper divisors (324310246).

648620486 is a wasteful number, since it uses less digits than its factorization.

648620486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324310245.

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 648620486 is about 25468.0287026695. The cubic root of 648620486 is about 865.6258564394.

The spelling of 648620486 in words is "six hundred forty-eight million, six hundred twenty thousand, four hundred eighty-six".