61800818 has 8 divisors (see below), whose sum is σ = 92880048. Its totient is φ = 30840804.

The previous prime is 61800803. The next prime is 61800833. The reversal of 61800818 is 81800816.

It is a happy number.

61800818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61800803) and next prime (61800833).

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

It is a super-2 number, since 2×61800818² = 7638682210938248, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 28496 + ... + 30587.

It is an arithmetic number, because the mean of its divisors is an integer number (11610006).

Almost surely, 2^61800818 is an apocalyptic number.

61800818 is a deficient number, since it is larger than the sum of its proper divisors (31079230).

61800818 is a wasteful number, since it uses less digits than its factorization.

61800818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59608.

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 61800818 is about 7861.3496296756. The cubic root of 61800818 is about 395.3648671574.

The spelling of 61800818 in words is "sixty-one million, eight hundred thousand, eight hundred eighteen".