2658128780 has 48 divisors (see below), whose sum is σ = 5632644864. Its totient is φ = 1053665280.

The previous prime is 2658128749. The next prime is 2658128797. The reversal of 2658128780 is 878218562.

It is a super-2 number, since 2×2658128780² = 14131297222128576800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1073624 + ... + 1076096.

It is an arithmetic number, because the mean of its divisors is an integer number (117346768).

Almost surely, 2^2658128780 is an apocalyptic number.

2658128780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2658128780 is an abundant number, since it is smaller than the sum of its proper divisors (2974516084).

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

2658128780 is a wasteful number, since it uses less digits than its factorization.

2658128780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2946 (or 2944 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 47.

The square root of 2658128780 is about 51557.0439416381. The cubic root of 2658128780 is about 1385.2410064246.

The spelling of 2658128780 in words is "two billion, six hundred fifty-eight million, one hundred twenty-eight thousand, seven hundred eighty".