61161285904 has 10 divisors (see below), whose sum is σ = 118499991470. Its totient is φ = 30580642944.

The previous prime is 61161285869. The next prime is 61161285923. The reversal of 61161285904 is 40958216116.

It can be written as a sum of positive squares in only one way, i.e., 41910278400 + 19251007504 = 204720^2 + 138748^2 .

It is an unprimeable number.

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, 1911290169 + ... + 1911290200.

It is an arithmetic number, because the mean of its divisors is an integer number (11849999147).

Almost surely, 2^61161285904 is an apocalyptic number.

It is an amenable number.

61161285904 is a deficient number, since it is larger than the sum of its proper divisors (57338705566).

61161285904 is a wasteful number, since it uses less digits than its factorization.

61161285904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3822580377 (or 3822580371 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 61161285904 in words is "sixty-one billion, one hundred sixty-one million, two hundred eighty-five thousand, nine hundred four".