2194533556025 has 6 divisors (see below), whose sum is σ = 2721221609502. Its totient is φ = 1755626844800.

The previous prime is 2194533556021. The next prime is 2194533556031. The reversal of 2194533556025 is 5206553354912.

It can be written as a sum of positive squares in 3 ways, for example, as 9978611449 + 2184554944576 = 99893^2 + 1478024^2 .

It is not a de Polignac number, because 2194533556025 - 2² = 2194533556021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2194533556021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43890671096 + ... + 43890671145.

It is an arithmetic number, because the mean of its divisors is an integer number (453536934917).

Almost surely, 2^{2194533556025} is an apocalyptic number.

2194533556025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2194533556025 is a deficient number, since it is larger than the sum of its proper divisors (526688053477).

2194533556025 is an equidigital number, since it uses as much as digits as its factorization.

2194533556025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87781342251 (or 87781342246 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 50.

The spelling of 2194533556025 in words is "two trillion, one hundred ninety-four billion, five hundred thirty-three million, five hundred fifty-six thousand, twenty-five".