2641788180 has 72 divisors (see below), whose sum is σ = 8164650312. Its totient is φ = 691182336.

The previous prime is 2641788179. The next prime is 2641788223. The reversal of 2641788180 is 818871462.

It can be written as a sum of positive squares in 4 ways, for example, as 1064586384 + 1577201796 = 32628^2 + 39714^2 .

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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128919 + ... + 147998.

It is an arithmetic number, because the mean of its divisors is an integer number (113397921).

Almost surely, 2^2641788180 is an apocalyptic number.

2641788180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2641788180 is an abundant number, since it is smaller than the sum of its proper divisors (5522862132).

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

2641788180 is a wasteful number, since it uses less digits than its factorization.

2641788180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276985 (or 276980 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The square root of 2641788180 is about 51398.3285720460. The cubic root of 2641788180 is about 1382.3966230647.

The spelling of 2641788180 in words is "two billion, six hundred forty-one million, seven hundred eighty-eight thousand, one hundred eighty".