61216642 has 8 divisors (see below), whose sum is σ = 91869516. Its totient is φ = 30593472.

The previous prime is 61216637. The next prime is 61216657. The reversal of 61216642 is 24661216.

It can be written as a sum of positive squares in 2 ways, for example, as 60699681 + 516961 = 7791^2 + 719^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 61216642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1243 + ... + 11134.

Almost surely, 2^61216642 is an apocalyptic number.

61216642 is a deficient number, since it is larger than the sum of its proper divisors (30652874).

61216642 is a wasteful number, since it uses less digits than its factorization.

61216642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14852.

The product of its digits is 3456, while the sum is 28.

The square root of 61216642 is about 7824.1064665558. The cubic root of 61216642 is about 394.1151844425.

Adding to 61216642 its reverse (24661216), we get a palindrome (85877858).

The spelling of 61216642 in words is "sixty-one million, two hundred sixteen thousand, six hundred forty-two".