14909209978 has 32 divisors (see below), whose sum is σ = 25365614400. Its totient is φ = 6515427456.

The previous prime is 14909209963. The next prime is 14909209979. The reversal of 14909209978 is 87990290941.

It is not an unprimeable number, because it can be changed into a prime (14909209979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1021758 + ... + 1036246.

It is an arithmetic number, because the mean of its divisors is an integer number (792675450).

Almost surely, 2^14909209978 is an apocalyptic number.

14909209978 is a deficient number, since it is larger than the sum of its proper divisors (10456404422).

14909209978 is a wasteful number, since it uses less digits than its factorization.

14909209978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16606.

The product of its (nonzero) digits is 2939328, while the sum is 58.

The spelling of 14909209978 in words is "fourteen billion, nine hundred nine million, two hundred nine thousand, nine hundred seventy-eight".