61278467858 has 8 divisors (see below), whose sum is σ = 91918855728. Its totient is φ = 30638849284.

The previous prime is 61278467837. The next prime is 61278467897. The reversal of 61278467858 is 85876487216.

61278467858 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 Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61278467858.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89285 + ... + 361287.

It is an arithmetic number, because the mean of its divisors is an integer number (11489856966).

Almost surely, 2^61278467858 is an apocalyptic number.

61278467858 is a deficient number, since it is larger than the sum of its proper divisors (30640387870).

61278467858 is a wasteful number, since it uses less digits than its factorization.

61278467858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384648.

The product of its digits is 36126720, while the sum is 62.

The spelling of 61278467858 in words is "sixty-one billion, two hundred seventy-eight million, four hundred sixty-seven thousand, eight hundred fifty-eight".