61161616 has 10 divisors (see below), whose sum is σ = 118500662. Its totient is φ = 30580800.

The previous prime is 61161613. The next prime is 61161619. The reversal of 61161616 is 61616116.

It is an interprime number because it is at equal distance from previous prime (61161613) and next prime (61161619).

It can be written as a sum of positive squares in only one way, i.e., 61152400 + 9216 = 7820^2 + 96^2 .

It is not an unprimeable number, because it can be changed into a prime (61161613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1911285 + ... + 1911316.

Almost surely, 2^61161616 is an apocalyptic number.

It is an amenable number.

61161616 is a deficient number, since it is larger than the sum of its proper divisors (57339046).

61161616 is a wasteful number, since it uses less digits than its factorization.

61161616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3822609 (or 3822603 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 61161616 is about 7820.5892361126. The cubic root of 61161616 is about 393.9970625151.

It can be divided in two parts, 6 and 1161616, that multiplied together give a palindrome (6969696).

The spelling of 61161616 in words is "sixty-one million, one hundred sixty-one thousand, six hundred sixteen".