309648734464 has 36 divisors (see below), whose sum is σ = 618294179440. Its totient is φ = 154772697600.

The previous prime is 309648734441. The next prime is 309648734467. The reversal of 309648734464 is 464437846903.

It is a junction number, because it is equal to n+sod(n) for n = 309648734399 and 309648734408.

It is not an unprimeable number, because it can be changed into a prime (309648734467) 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, 572539 + ... + 973189.

Almost surely, 2^309648734464 is an apocalyptic number.

It is an amenable number.

309648734464 is a deficient number, since it is larger than the sum of its proper divisors (308645444976).

309648734464 is an equidigital number, since it uses as much as digits as its factorization.

309648734464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403686 (or 403672 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 58.

The spelling of 309648734464 in words is "three hundred nine billion, six hundred forty-eight million, seven hundred thirty-four thousand, four hundred sixty-four".