61236778 has 8 divisors (see below), whose sum is σ = 91918080. Its totient is φ = 30597420.

The previous prime is 61236761. The next prime is 61236803. The reversal of 61236778 is 87763216.

61236778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 61236778.

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, 6538 + ... + 12853.

It is an arithmetic number, because the mean of its divisors is an integer number (11489760).

Almost surely, 2^61236778 is an apocalyptic number.

61236778 is a deficient number, since it is larger than the sum of its proper divisors (30681302).

61236778 is a wasteful number, since it uses less digits than its factorization.

61236778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20972.

The product of its digits is 84672, while the sum is 40.

The square root of 61236778 is about 7825.3931530627. The cubic root of 61236778 is about 394.1583918293.

The spelling of 61236778 in words is "sixty-one million, two hundred thirty-six thousand, seven hundred seventy-eight".