306642305146 has 4 divisors (see below), whose sum is σ = 459963457722. Its totient is φ = 153321152572.

The previous prime is 306642305143. The next prime is 306642305147. The reversal of 306642305146 is 641503246603.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641503246603 = 29 ⋅22120801607.

It can be written as a sum of positive squares in only one way, i.e., 297940213921 + 8702091225 = 545839^2 + 93285^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 306642305099 and 306642305108.

It is not an unprimeable number, because it can be changed into a prime (306642305143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76660576285 + ... + 76660576288.

Almost surely, 2^306642305146 is an apocalyptic number.

306642305146 is a deficient number, since it is larger than the sum of its proper divisors (153321152576).

306642305146 is a wasteful number, since it uses less digits than its factorization.

306642305146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153321152575.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 306642305146 in words is "three hundred six billion, six hundred forty-two million, three hundred five thousand, one hundred forty-six".