50861578 has 4 divisors (see below), whose sum is σ = 76292370. Its totient is φ = 25430788.

The previous prime is 50861521. The next prime is 50861641. The reversal of 50861578 is 87516805.

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

It can be written as a sum of positive squares in only one way, i.e., 26388769 + 24472809 = 5137^2 + 4947^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 50861578.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12715393 + ... + 12715396.

Almost surely, 2^50861578 is an apocalyptic number.

50861578 is a deficient number, since it is larger than the sum of its proper divisors (25430792).

50861578 is a wasteful number, since it uses less digits than its factorization.

50861578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25430791.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 50861578 is about 7131.7303650657. The cubic root of 50861578 is about 370.5071642568.

The spelling of 50861578 in words is "fifty million, eight hundred sixty-one thousand, five hundred seventy-eight".