61568438 has 8 divisors (see below), whose sum is σ = 92964720. Its totient is φ = 30580200.

The previous prime is 61568371. The next prime is 61568443. The reversal of 61568438 is 83486516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 61568395 and 61568404.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 101633 + ... + 102236.

It is an arithmetic number, because the mean of its divisors is an integer number (11620590).

Almost surely, 2^61568438 is an apocalyptic number.

61568438 is a deficient number, since it is larger than the sum of its proper divisors (31396282).

61568438 is a wasteful number, since it uses less digits than its factorization.

61568438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204022.

The product of its digits is 138240, while the sum is 41.

The square root of 61568438 is about 7846.5558049376. Note that the first 3 decimals coincide. The cubic root of 61568438 is about 394.8687017546.

The spelling of 61568438 in words is "sixty-one million, five hundred sixty-eight thousand, four hundred thirty-eight".