309759985018 has 32 divisors (see below), whose sum is σ = 515145458880. Its totient is φ = 138513951360.

The previous prime is 309759984977. The next prime is 309759985057. The reversal of 309759985018 is 810589957903.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 376821 + ... + 872647.

It is an arithmetic number, because the mean of its divisors is an integer number (16098295590).

Almost surely, 2^309759985018 is an apocalyptic number.

309759985018 is a deficient number, since it is larger than the sum of its proper divisors (205385473862).

309759985018 is a wasteful number, since it uses less digits than its factorization.

309759985018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496302.

The product of its (nonzero) digits is 24494400, while the sum is 64.

The spelling of 309759985018 in words is "three hundred nine billion, seven hundred fifty-nine million, nine hundred eighty-five thousand, eighteen".