61730357643 has 12 divisors (see below), whose sum is σ = 89282032840. Its totient is φ = 41100051456.

The previous prime is 61730357641. The next prime is 61730357651. The reversal of 61730357643 is 34675303716.

It is a happy number.

61730357643 is a `hidden beast` number, since 6 + 1 + 7 + 30 + 3 + 576 + 43 = 666.

It is not a de Polignac number, because 61730357643 - 2¹ = 61730357641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61730357641) 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, 4452721 + ... + 4466562.

Almost surely, 2^61730357643 is an apocalyptic number.

61730357643 is a deficient number, since it is larger than the sum of its proper divisors (27551675197).

61730357643 is a wasteful number, since it uses less digits than its factorization.

61730357643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8920058 (or 8920055 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 45.

The spelling of 61730357643 in words is "sixty-one billion, seven hundred thirty million, three hundred fifty-seven thousand, six hundred forty-three".