61332845609 has 4 divisors (see below), whose sum is σ = 70094680704. Its totient is φ = 52571010516.

The previous prime is 61332845551. The next prime is 61332845611. The reversal of 61332845609 is 90654823316.

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 61332845609 - 2¹² = 61332841513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61332845209) 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 3 ways as a sum of consecutive naturals, for example, 4380917537 + ... + 4380917550.

It is an arithmetic number, because the mean of its divisors is an integer number (17523670176).

Almost surely, 2^61332845609 is an apocalyptic number.

It is an amenable number.

61332845609 is a deficient number, since it is larger than the sum of its proper divisors (8761835095).

61332845609 is an equidigital number, since it uses as much as digits as its factorization.

61332845609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8761835094.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 61332845609 in words is "sixty-one billion, three hundred thirty-two million, eight hundred forty-five thousand, six hundred nine".