1945533725 has 6 divisors (see below), whose sum is σ = 2412461850. Its totient is φ = 1556426960.

The previous prime is 1945533721. The next prime is 1945533727. The reversal of 1945533725 is 5273355491.

It can be written as a sum of positive squares in 3 ways, for example, as 106276 + 1945427449 = 326^2 + 44107^2 .

It is not a de Polignac number, because 1945533725 - 2² = 1945533721 is a prime.

It is a super-2 number, since 2×1945533725² = 7570202950224751250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945533721) 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, 38910650 + ... + 38910699.

It is an arithmetic number, because the mean of its divisors is an integer number (402076975).

Almost surely, 2^1945533725 is an apocalyptic number.

It is an amenable number.

1945533725 is a deficient number, since it is larger than the sum of its proper divisors (466928125).

1945533725 is an equidigital number, since it uses as much as digits as its factorization.

1945533725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77821359 (or 77821354 counting only the distinct ones).

The product of its digits is 567000, while the sum is 44.

The square root of 1945533725 is about 44108.2047356271. The cubic root of 1945533725 is about 1248.3784253060.

The spelling of 1945533725 in words is "one billion, nine hundred forty-five million, five hundred thirty-three thousand, seven hundred twenty-five".