61533244618 has 16 divisors (see below), whose sum is σ = 97244802720. Its totient is φ = 29121212016.

The previous prime is 61533244613. The next prime is 61533244631. The reversal of 61533244618 is 81644233516.

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, 682396 + ... + 767287.

It is an arithmetic number, because the mean of its divisors is an integer number (6077800170).

Almost surely, 2^61533244618 is an apocalyptic number.

61533244618 is a deficient number, since it is larger than the sum of its proper divisors (35711558102).

61533244618 is a wasteful number, since it uses less digits than its factorization.

61533244618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450821.

The product of its digits is 414720, while the sum is 43.

The spelling of 61533244618 in words is "sixty-one billion, five hundred thirty-three million, two hundred forty-four thousand, six hundred eighteen".