61533244617 has 8 divisors (see below), whose sum is σ = 88355428224. Its totient is φ = 37866612048.

The previous prime is 61533244613. The next prime is 61533244631. The reversal of 61533244617 is 71644233516.

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

It is not a de Polignac number, because 61533244617 - 2² = 61533244613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61533244613) 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 in 7 ways as a sum of consecutive naturals, for example, 788887713 + ... + 788887790.

It is an arithmetic number, because the mean of its divisors is an integer number (11044428528).

Almost surely, 2^61533244617 is an apocalyptic number.

It is an amenable number.

61533244617 is a deficient number, since it is larger than the sum of its proper divisors (26822183607).

61533244617 is a wasteful number, since it uses less digits than its factorization.

61533244617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577775519.

The product of its digits is 362880, while the sum is 42.

The spelling of 61533244617 in words is "sixty-one billion, five hundred thirty-three million, two hundred forty-four thousand, six hundred seventeen".