61423636 has 12 divisors (see below), whose sum is σ = 108443412. Its totient is φ = 30439808.

The previous prime is 61423631. The next prime is 61423643. The reversal of 61423636 is 63632416.

61423636 = T₃₉ + T₄₀ + ... + T₇₁₆.

It can be written as a sum of positive squares in 2 ways, for example, as 2992900 + 58430736 = 1730^2 + 7644^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61423598 and 61423607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61423631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67495 + ... + 68398.

It is an arithmetic number, because the mean of its divisors is an integer number (9036951).

Almost surely, 2^61423636 is an apocalyptic number.

It is an amenable number.

61423636 is a deficient number, since it is larger than the sum of its proper divisors (47019776).

61423636 is a wasteful number, since it uses less digits than its factorization.

61423636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136010 (or 136008 counting only the distinct ones).

The product of its digits is 15552, while the sum is 31.

The square root of 61423636 is about 7837.3232675449. The cubic root of 61423636 is about 394.5588965823.

The spelling of 61423636 in words is "sixty-one million, four hundred twenty-three thousand, six hundred thirty-six".