73561636 has 24 divisors (see below), whose sum is σ = 138668544. Its totient is φ = 34045440.

The previous prime is 73561619. The next prime is 73561639. The reversal of 73561636 is 63616537.

It is a super-2 number, since 2×73561636² = 10822628581992992, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 73561595 and 73561604.

It is not an unprimeable number, because it can be changed into a prime (73561639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10045 + ... + 15748.

It is an arithmetic number, because the mean of its divisors is an integer number (5777856).

Almost surely, 2^73561636 is an apocalyptic number.

It is an amenable number.

73561636 is a deficient number, since it is larger than the sum of its proper divisors (65106908).

73561636 is a wasteful number, since it uses less digits than its factorization.

73561636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25851 (or 25849 counting only the distinct ones).

The product of its digits is 68040, while the sum is 37.

The square root of 73561636 is about 8576.8080309635. The cubic root of 73561636 is about 419.0029941895.

The spelling of 73561636 in words is "seventy-three million, five hundred sixty-one thousand, six hundred thirty-six".