61198605 has 32 divisors (see below), whose sum is σ = 117169920. Its totient is φ = 30127680.

The previous prime is 61198603. The next prime is 61198649. The reversal of 61198605 is 50689116.

61198605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61198605 - 2¹ = 61198603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61198605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61198603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15681 + ... + 19190.

It is an arithmetic number, because the mean of its divisors is an integer number (3661560).

Almost surely, 2^61198605 is an apocalyptic number.

61198605 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61198605 is a deficient number, since it is larger than the sum of its proper divisors (55971315).

61198605 is a wasteful number, since it uses less digits than its factorization.

61198605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34898 (or 34892 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 61198605 is about 7822.9537260551. The cubic root of 61198605 is about 394.0764729983.

The spelling of 61198605 in words is "sixty-one million, one hundred ninety-eight thousand, six hundred five".