61816105 has 16 divisors (see below), whose sum is σ = 80098704. Its totient is φ = 45527040.

The previous prime is 61816103. The next prime is 61816109. The reversal of 61816105 is 50161816.

It can be written as a sum of positive squares in 8 ways, for example, as 929296 + 60886809 = 964^2 + 7803^2 .

It is not a de Polignac number, because 61816105 - 2¹ = 61816103 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61816103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28665 + ... + 30745.

It is an arithmetic number, because the mean of its divisors is an integer number (5006169).

Almost surely, 2^61816105 is an apocalyptic number.

61816105 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61816105 is a deficient number, since it is larger than the sum of its proper divisors (18282599).

61816105 is a wasteful number, since it uses less digits than its factorization.

61816105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 61816105 is about 7862.3218580773. The cubic root of 61816105 is about 395.3974635137.

The spelling of 61816105 in words is "sixty-one million, eight hundred sixteen thousand, one hundred five".