2177255226980 has 36 divisors (see below), whose sum is σ = 4724485291260. Its totient is φ = 842808467520.

The previous prime is 2177255226961. The next prime is 2177255226989. The reversal of 2177255226980 is 896225527712.

It can be written as a sum of positive squares in 2 ways, for example, as 1236615169024 + 940640057956 = 1112032^2 + 969866^2 .

It is not an unprimeable number, because it can be changed into a prime (2177255226989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56621135 + ... + 56659574.

It is an arithmetic number, because the mean of its divisors is an integer number (131235702535).

Almost surely, 2^{2177255226980} is an apocalyptic number.

2177255226980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2177255226980 is an abundant number, since it is smaller than the sum of its proper divisors (2547230064280).

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

2177255226980 is a wasteful number, since it uses less digits than its factorization.

2177255226980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113280780 (or 113280747 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 56.

The spelling of 2177255226980 in words is "two trillion, one hundred seventy-seven billion, two hundred fifty-five million, two hundred twenty-six thousand, nine hundred eighty".