61884640733 has 4 divisors (see below), whose sum is σ = 61959471840. Its totient is φ = 61809809628.

The previous prime is 61884640717. The next prime is 61884640747. The reversal of 61884640733 is 33704648816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61884640733 - 2⁴ = 61884640717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61884640793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37414313 + ... + 37415966.

It is an arithmetic number, because the mean of its divisors is an integer number (15489867960).

Almost surely, 2^61884640733 is an apocalyptic number.

It is an amenable number.

61884640733 is a deficient number, since it is larger than the sum of its proper divisors (74831107).

61884640733 is an equidigital number, since it uses as much as digits as its factorization.

61884640733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74831106.

The product of its (nonzero) digits is 2322432, while the sum is 50.

The spelling of 61884640733 in words is "sixty-one billion, eight hundred eighty-four million, six hundred forty thousand, seven hundred thirty-three".