2751681780 has 60 divisors (see below), whose sum is σ = 8632132740. Its totient is φ = 733781376.

The previous prime is 2751681767. The next prime is 2751681809. The reversal of 2751681780 is 871861572.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 471237264 + 2280444516 = 21708^2 + 47754^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 847665 + ... + 850904.

It is an arithmetic number, because the mean of its divisors is an integer number (143868879).

Almost surely, 2^2751681780 is an apocalyptic number.

2751681780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2751681780 is an abundant number, since it is smaller than the sum of its proper divisors (5880450960).

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

2751681780 is a wasteful number, since it uses less digits than its factorization.

2751681780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698590 (or 1698579 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 45.

The square root of 2751681780 is about 52456.4751007919. The cubic root of 2751681780 is about 1401.3052079578.

The spelling of 2751681780 in words is "two billion, seven hundred fifty-one million, six hundred eighty-one thousand, seven hundred eighty".