648678193145 has 8 divisors (see below), whose sum is σ = 797399535240. Its totient is φ = 506285418880.

The previous prime is 648678193133. The next prime is 648678193157. The reversal of 648678193145 is 541391876846.

It is an interprime number because it is at equal distance from previous prime (648678193133) and next prime (648678193157).

It can be written as a sum of positive squares in 4 ways, for example, as 20926226281 + 627751966864 = 144659^2 + 792308^2 .

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

It is not a de Polignac number, because 648678193145 - 2⁸ = 648678192889 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1582141730 + ... + 1582142139.

It is an arithmetic number, because the mean of its divisors is an integer number (99674941905).

Almost surely, 2^648678193145 is an apocalyptic number.

It is an amenable number.

648678193145 is a deficient number, since it is larger than the sum of its proper divisors (148721342095).

648678193145 is a wasteful number, since it uses less digits than its factorization.

648678193145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3164283915.

The product of its digits is 34836480, while the sum is 62.

The spelling of 648678193145 in words is "six hundred forty-eight billion, six hundred seventy-eight million, one hundred ninety-three thousand, one hundred forty-five".