61636442 has 16 divisors (see below), whose sum is σ = 105796800. Its totient is φ = 26382048.

The previous prime is 61636439. The next prime is 61636447. The reversal of 61636442 is 24463616.

It is a junction number, because it is equal to n+sod(n) for n = 61636399 and 61636408.

It is not an unprimeable number, because it can be changed into a prime (61636447) 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 7 ways as a sum of consecutive naturals, for example, 10934 + ... + 15582.

It is an arithmetic number, because the mean of its divisors is an integer number (6612300).

Almost surely, 2^61636442 is an apocalyptic number.

61636442 is a deficient number, since it is larger than the sum of its proper divisors (44160358).

61636442 is a wasteful number, since it uses less digits than its factorization.

61636442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5605.

The product of its digits is 20736, while the sum is 32.

The square root of 61636442 is about 7850.8879752548. The cubic root of 61636442 is about 395.0140293046.

The spelling of 61636442 in words is "sixty-one million, six hundred thirty-six thousand, four hundred forty-two".