309149116940 has 24 divisors (see below), whose sum is σ = 649224480240. Its totient is φ = 123657487808.

The previous prime is 309149116897. The next prime is 309149116957. The reversal of 309149116940 is 49611941903.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1556171 + ... + 1743549.

It is an arithmetic number, because the mean of its divisors is an integer number (27051020010).

Almost surely, 2^309149116940 is an apocalyptic number.

It is an amenable number.

309149116940 is an abundant number, since it is smaller than the sum of its proper divisors (340075363300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

309149116940 is a wasteful number, since it uses less digits than its factorization.

309149116940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269881 (or 269879 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 47.

The spelling of 309149116940 in words is "three hundred nine billion, one hundred forty-nine million, one hundred sixteen thousand, nine hundred forty".