16121178005 has 16 divisors (see below), whose sum is σ = 19546951104. Its totient is φ = 12762840960.

The previous prime is 16121177971. The next prime is 16121178037. The reversal of 16121178005 is 50087112161.

It is not a de Polignac number, because 16121178005 - 2³² = 11826210709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503969 + ... + 535001.

It is an arithmetic number, because the mean of its divisors is an integer number (1221684444).

Almost surely, 2^16121178005 is an apocalyptic number.

It is an amenable number.

16121178005 is a deficient number, since it is larger than the sum of its proper divisors (3425773099).

16121178005 is a wasteful number, since it uses less digits than its factorization.

16121178005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32116.

The product of its (nonzero) digits is 3360, while the sum is 32.

The spelling of 16121178005 in words is "sixteen billion, one hundred twenty-one million, one hundred seventy-eight thousand, five".