309748347458 has 16 divisors (see below), whose sum is σ = 511049869920. Its totient is φ = 140794702180.

The previous prime is 309748347401. The next prime is 309748347509. The reversal of 309748347458 is 854743847903.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 309748347458.

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, 58176968 + ... + 58182291.

It is an arithmetic number, because the mean of its divisors is an integer number (31940616870).

Almost surely, 2^309748347458 is an apocalyptic number.

309748347458 is a deficient number, since it is larger than the sum of its proper divisors (201301522462).

309748347458 is a wasteful number, since it uses less digits than its factorization.

309748347458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116359294 (or 116359272 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 62.

The spelling of 309748347458 in words is "three hundred nine billion, seven hundred forty-eight million, three hundred forty-seven thousand, four hundred fifty-eight".