3636421725 has 24 divisors (see below), whose sum is σ = 6140142720. Its totient is φ = 1898158720.

The previous prime is 3636421627. The next prime is 3636421727. The reversal of 3636421725 is 5271246363.

It is not a de Polignac number, because 3636421725 - 2¹⁵ = 3636388957 is a prime.

It is a super-3 number, since 3×3636421725³ (a number of 30 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3636421727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 512280 + ... + 519329.

It is an arithmetic number, because the mean of its divisors is an integer number (255839280).

Almost surely, 2^3636421725 is an apocalyptic number.

It is an amenable number.

3636421725 is a deficient number, since it is larger than the sum of its proper divisors (2503720995).

3636421725 is a wasteful number, since it uses less digits than its factorization.

3636421725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031669 (or 1031664 counting only the distinct ones).

The product of its digits is 181440, while the sum is 39.

The square root of 3636421725 is about 60302.7505591577. The cubic root of 3636421725 is about 1537.7701078755.

The spelling of 3636421725 in words is "three billion, six hundred thirty-six million, four hundred twenty-one thousand, seven hundred twenty-five".