305611136993 has 4 divisors (see below), whose sum is σ = 305755772868. Its totient is φ = 305466501120.

The previous prime is 305611136923. The next prime is 305611137037. The reversal of 305611136993 is 399631116503.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28226688064 + 277384448929 = 168008^2 + 526673^2 .

It is a cyclic number.

It is not a de Polignac number, because 305611136993 - 2⁸ = 305611136737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (305611136903) 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, 72314768 + ... + 72318993.

It is an arithmetic number, because the mean of its divisors is an integer number (76438943217).

Almost surely, 2^305611136993 is an apocalyptic number.

It is an amenable number.

305611136993 is a deficient number, since it is larger than the sum of its proper divisors (144635875).

305611136993 is a wasteful number, since it uses less digits than its factorization.

305611136993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144635874.

The product of its (nonzero) digits is 393660, while the sum is 47.

The spelling of 305611136993 in words is "three hundred five billion, six hundred eleven million, one hundred thirty-six thousand, nine hundred ninety-three".