61185118 has 4 divisors (see below), whose sum is σ = 91777680. Its totient is φ = 30592558.

The previous prime is 61185107. The next prime is 61185119. The reversal of 61185118 is 81158116.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 61185118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61185119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15296278 + ... + 15296281.

It is an arithmetic number, because the mean of its divisors is an integer number (22944420).

Almost surely, 2^61185118 is an apocalyptic number.

61185118 is a deficient number, since it is larger than the sum of its proper divisors (30592562).

61185118 is a wasteful number, since it uses less digits than its factorization.

61185118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30592561.

The product of its digits is 1920, while the sum is 31.

The square root of 61185118 is about 7822.0916639988. The cubic root of 61185118 is about 394.0475219033.

It can be divided in two parts, 6118 and 5118, that added together give a square (11236 = 106²).

The spelling of 61185118 in words is "sixty-one million, one hundred eighty-five thousand, one hundred eighteen".