61447806194 has 4 divisors (see below), whose sum is σ = 92171709294. Its totient is φ = 30723903096.

The previous prime is 61447806191. The next prime is 61447806209. The reversal of 61447806194 is 49160874416.

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., 33118540225 + 28329265969 = 181985^2 + 168313^2 .

It is not an unprimeable number, because it can be changed into a prime (61447806191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15361951547 + ... + 15361951550.

Almost surely, 2^61447806194 is an apocalyptic number.

61447806194 is a deficient number, since it is larger than the sum of its proper divisors (30723903100).

61447806194 is a wasteful number, since it uses less digits than its factorization.

61447806194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30723903099.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 61447806194 in words is "sixty-one billion, four hundred forty-seven million, eight hundred six thousand, one hundred ninety-four".