309355379949 has 48 divisors (see below), whose sum is σ = 523673289216. Its totient is φ = 160631301600.

The previous prime is 309355379911. The next prime is 309355379969. The reversal of 309355379949 is 949973553903.

It is not a de Polignac number, because 309355379949 - 2⁷ = 309355379821 is a prime.

It is a super-2 number, since 2×309355379949² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 309355379949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309355379909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3623544 + ... + 3707934.

It is an arithmetic number, because the mean of its divisors is an integer number (10909860192).

Almost surely, 2^309355379949 is an apocalyptic number.

It is an amenable number.

309355379949 is a deficient number, since it is larger than the sum of its proper divisors (214317909267).

309355379949 is a wasteful number, since it uses less digits than its factorization.

309355379949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86686 (or 86679 counting only the distinct ones).

The product of its (nonzero) digits is 124002900, while the sum is 66.

The spelling of 309355379949 in words is "three hundred nine billion, three hundred fifty-five million, three hundred seventy-nine thousand, nine hundred forty-nine".