2180214668025 has 81 divisors (see below), whose sum is σ = 3934624445479. Its totient is φ = 1154028138240.

The previous prime is 2180214667993. The next prime is 2180214668029. The reversal of 2180214668025 is 5208664120812.

The square root of 2180214668025 is 1476555.

It is a perfect power (a square), and thus also a powerful number.

2180214668025 is a `hidden beast` number, since 2 + 180 + 2 + 1 + 466 + 8 + 0 + 2 + 5 = 666.

It can be written as a sum of positive squares in 13 ways, for example, as 1153624216761 + 1026590451264 = 1074069^2 + 1013208^2 .

It is not a de Polignac number, because 2180214668025 - 2⁵ = 2180214667993 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2180214668029) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 3831659941 + ... + 3831660509.

Almost surely, 2^{2180214668025} is an apocalyptic number.

2180214668025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2180214668025 is the 1476555-th square number.

2180214668025 is the 738278-th centered octagonal number.

It is an amenable number.

2180214668025 is a deficient number, since it is larger than the sum of its proper divisors (1754409777454).

2180214668025 is an frugal number, since it uses more digits than its factorization.

2180214668025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

Adding to 2180214668025 its reverse (5208664120812), we get a palindrome (7388878788837).

The spelling of 2180214668025 in words is "two trillion, one hundred eighty billion, two hundred fourteen million, six hundred sixty-eight thousand, twenty-five".