61363158985 has 8 divisors (see below), whose sum is σ = 73638100296. Its totient is φ = 49088987520.

The previous prime is 61363158977. The next prime is 61363159007. The reversal of 61363158985 is 58985136316.

It can be written as a sum of positive squares in 4 ways, for example, as 33277421241 + 28085737744 = 182421^2 + 167588^2 .

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

It is not a de Polignac number, because 61363158985 - 2³ = 61363158977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487 + ... + 350323.

It is an arithmetic number, because the mean of its divisors is an integer number (9204762537).

Almost surely, 2^61363158985 is an apocalyptic number.

It is an amenable number.

61363158985 is a deficient number, since it is larger than the sum of its proper divisors (12274941311).

61363158985 is a wasteful number, since it uses less digits than its factorization.

61363158985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384923.

The product of its digits is 4665600, while the sum is 55.

The spelling of 61363158985 in words is "sixty-one billion, three hundred sixty-three million, one hundred fifty-eight thousand, nine hundred eighty-five".