2648904781780 has 24 divisors (see below), whose sum is σ = 5889917692008. Its totient is φ = 997234741248.

The previous prime is 2648904781777. The next prime is 2648904781799. The reversal of 2648904781780 is 871874098462.

It can be written as a sum of positive squares in 4 ways, for example, as 1306801067716 + 1342103714064 = 1143154^2 + 1158492^2 .

It is a congruent number.

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, 3895447869 + ... + 3895448548.

It is an arithmetic number, because the mean of its divisors is an integer number (245413237167).

Almost surely, 2^{2648904781780} is an apocalyptic number.

2648904781780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2648904781780 is an abundant number, since it is smaller than the sum of its proper divisors (3241012910228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2648904781780 is a wasteful number, since it uses less digits than its factorization.

2648904781780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7790896443 (or 7790896441 counting only the distinct ones).

The product of its (nonzero) digits is 43352064, while the sum is 64.

The spelling of 2648904781780 in words is "two trillion, six hundred forty-eight billion, nine hundred four million, seven hundred eighty-one thousand, seven hundred eighty".