36209903521 has 9 divisors (see below), whose sum is σ = 39803269233. Its totient is φ = 32916191220.

The previous prime is 36209903501. The next prime is 36209903537. The reversal of 36209903521 is 12530990263.

The square root of 36209903521 is 190289.

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

It is not a de Polignac number, because 36209903521 - 2⁵ = 36209903489 is a prime.

It is a super-2 number, since 2×36209903521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36209903501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2084530 + ... + 2101828.

Almost surely, 2^36209903521 is an apocalyptic number.

36209903521 is the 190289-th square number.

36209903521 is the 95145-th centered octagonal number.

It is an amenable number.

36209903521 is a deficient number, since it is larger than the sum of its proper divisors (3593365712).

36209903521 is an frugal number, since it uses more digits than its factorization.

36209903521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34620 (or 17310 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 40.

The spelling of 36209903521 in words is "thirty-six billion, two hundred nine million, nine hundred three thousand, five hundred twenty-one".