648840083870 has 64 divisors (see below), whose sum is σ = 1291982275584. Its totient is φ = 232647409920.

The previous prime is 648840083861. The next prime is 648840083887. The reversal of 648840083870 is 78380048846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2516999 + ... + 2762781.

It is an arithmetic number, because the mean of its divisors is an integer number (20187223056).

Almost surely, 2^648840083870 is an apocalyptic number.

648840083870 is a deficient number, since it is larger than the sum of its proper divisors (643142191714).

648840083870 is a wasteful number, since it uses less digits than its factorization.

648840083870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246137.

The product of its (nonzero) digits is 8257536, while the sum is 56.

The spelling of 648840083870 in words is "six hundred forty-eight billion, eight hundred forty million, eighty-three thousand, eight hundred seventy".