61308730609 has 12 divisors (see below), whose sum is σ = 73245973696. Its totient is φ = 50265540072.

The previous prime is 61308730607. The next prime is 61308730621. The reversal of 61308730609 is 90603780316.

It is not a de Polignac number, because 61308730609 - 2¹ = 61308730607 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61308730601) 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 11 ways as a sum of consecutive naturals, for example, 8274549 + ... + 8281954.

Almost surely, 2^61308730609 is an apocalyptic number.

It is an amenable number.

61308730609 is a deficient number, since it is larger than the sum of its proper divisors (11937243087).

61308730609 is a wasteful number, since it uses less digits than its factorization.

61308730609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16556556 (or 16556533 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 61308730609 in words is "sixty-one billion, three hundred eight million, seven hundred thirty thousand, six hundred nine".