61633093818 has 32 divisors (see below), whose sum is σ = 123748508160. Its totient is φ = 20464136000.

The previous prime is 61633093811. The next prime is 61633093877. The reversal of 61633093818 is 81839033616.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61633093811) 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 15 ways as a sum of consecutive naturals, for example, 1581568 + ... + 1620068.

It is an arithmetic number, because the mean of its divisors is an integer number (3867140880).

Almost surely, 2^61633093818 is an apocalyptic number.

61633093818 is an abundant number, since it is smaller than the sum of its proper divisors (62115414342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61633093818 is a wasteful number, since it uses less digits than its factorization.

61633093818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39542.

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 61633093818 in words is "sixty-one billion, six hundred thirty-three million, ninety-three thousand, eight hundred eighteen".