309426161978 has 16 divisors (see below), whose sum is σ = 464973177600. Its totient is φ = 154435169616.

The previous prime is 309426161977. The next prime is 309426162037. The reversal of 309426161978 is 879161624903.

It is not an unprimeable number, because it can be changed into a prime (309426161977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15675551 + ... + 15695277.

It is an arithmetic number, because the mean of its divisors is an integer number (29060823600).

Almost surely, 2^309426161978 is an apocalyptic number.

309426161978 is a deficient number, since it is larger than the sum of its proper divisors (155547015622).

309426161978 is a wasteful number, since it uses less digits than its factorization.

309426161978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33421.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 309426161978 in words is "three hundred nine billion, four hundred twenty-six million, one hundred sixty-one thousand, nine hundred seventy-eight".