306397972456 has 8 divisors (see below), whose sum is σ = 574496198370. Its totient is φ = 153198986224.

The previous prime is 306397972451. The next prime is 306397972469. The reversal of 306397972456 is 654279793603.

It can be written as a sum of positive squares in only one way, i.e., 300705269956 + 5692702500 = 548366^2 + 75450^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 306397972394 and 306397972403.

It is not an unprimeable number, because it can be changed into a prime (306397972451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19149873271 + ... + 19149873286.

Almost surely, 2^306397972456 is an apocalyptic number.

It is an amenable number.

306397972456 is a deficient number, since it is larger than the sum of its proper divisors (268098225914).

306397972456 is a wasteful number, since it uses less digits than its factorization.

306397972456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38299746563 (or 38299746559 counting only the distinct ones).

The product of its (nonzero) digits is 51438240, while the sum is 61.

The spelling of 306397972456 in words is "three hundred six billion, three hundred ninety-seven million, nine hundred seventy-two thousand, four hundred fifty-six".