305681445117 has 12 divisors (see below), whose sum is σ = 441955250464. Its totient is φ = 203595913800.

The previous prime is 305681445101. The next prime is 305681445119. The reversal of 305681445117 is 711544186503.

305681445117 is a `hidden beast` number, since 3 + 0 + 56 + 81 + 4 + 4 + 511 + 7 = 666.

It is not a de Polignac number, because 305681445117 - 2⁴ = 305681445101 is a prime.

It is a super-2 number, since 2×305681445117² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305681445119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15966259 + ... + 15985392.

Almost surely, 2^305681445117 is an apocalyptic number.

It is an amenable number.

305681445117 is a deficient number, since it is larger than the sum of its proper divisors (136273805347).

305681445117 is a wasteful number, since it uses less digits than its factorization.

305681445117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31952720 (or 31952717 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 305681445117 in words is "three hundred five billion, six hundred eighty-one million, four hundred forty-five thousand, one hundred seventeen".