305442190847947 has 8 divisors (see below), whose sum is σ = 307130501149472. Its totient is φ = 303753889166400.

The previous prime is 305442190847923. The next prime is 305442190847999. The reversal of 305442190847947 is 749748091244503.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305442190847947 is a prime.

It is a super-3 number, since 3×305442190847947³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (305442190845947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76902322 + ... + 80776552.

It is an arithmetic number, because the mean of its divisors is an integer number (38391312643684).

Almost surely, 2^{305442190847947} is an apocalyptic number.

305442190847947 is a deficient number, since it is larger than the sum of its proper divisors (1688310301525).

305442190847947 is a wasteful number, since it uses less digits than its factorization.

305442190847947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309989.

The product of its (nonzero) digits is 243855360, while the sum is 67.

The spelling of 305442190847947 in words is "three hundred five trillion, four hundred forty-two billion, one hundred ninety million, eight hundred forty-seven thousand, nine hundred forty-seven".