648820556015 has 8 divisors (see below), whose sum is σ = 779982488640. Its totient is φ = 518124563872.

The previous prime is 648820555961. The next prime is 648820556017. The reversal of 648820556015 is 510655028846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 648820556015 - 2³² = 644525588719 is a prime.

It is a super-2 number, since 2×648820556015² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648820556017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116482055 + ... + 116487624.

It is an arithmetic number, because the mean of its divisors is an integer number (97497811080).

Almost surely, 2^648820556015 is an apocalyptic number.

648820556015 is a deficient number, since it is larger than the sum of its proper divisors (131161932625).

648820556015 is a wasteful number, since it uses less digits than its factorization.

648820556015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232970241.

The product of its (nonzero) digits is 2304000, while the sum is 50.

The spelling of 648820556015 in words is "six hundred forty-eight billion, eight hundred twenty million, five hundred fifty-six thousand, fifteen".