2775813780 has 96 divisors (see below), whose sum is σ = 8046517248. Its totient is φ = 714240000.

The previous prime is 2775813773. The next prime is 2775813809. The reversal of 2775813780 is 873185772.

2775813780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 691780 + ... + 695780.

It is an arithmetic number, because the mean of its divisors is an integer number (83817888).

Almost surely, 2^2775813780 is an apocalyptic number.

2775813780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2775813780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4023258624).

2775813780 is an abundant number, since it is smaller than the sum of its proper divisors (5270703468).

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

2775813780 is a wasteful number, since it uses less digits than its factorization.

2775813780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4417 (or 4415 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 48.

The square root of 2775813780 is about 52685.9922560067. The cubic root of 2775813780 is about 1405.3897307488.

The spelling of 2775813780 in words is "two billion, seven hundred seventy-five million, eight hundred thirteen thousand, seven hundred eighty".