648371180985 has 32 divisors (see below), whose sum is σ = 1132352956800. Its totient is φ = 314181081600.

The previous prime is 648371180957. The next prime is 648371180987. The reversal of 648371180985 is 589081173846.

It is not a de Polignac number, because 648371180985 - 2⁵ = 648371180953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648371180987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 841260 + ... + 1415789.

It is an arithmetic number, because the mean of its divisors is an integer number (35386029900).

Almost surely, 2^648371180985 is an apocalyptic number.

It is an amenable number.

648371180985 is a deficient number, since it is larger than the sum of its proper divisors (483981775815).

648371180985 is a wasteful number, since it uses less digits than its factorization.

648371180985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2258809.

The product of its (nonzero) digits is 11612160, while the sum is 60.

The spelling of 648371180985 in words is "six hundred forty-eight billion, three hundred seventy-one million, one hundred eighty thousand, nine hundred eighty-five".