16251671121 has 16 divisors (see below), whose sum is σ = 24766540800. Its totient is φ = 9285885648.

The previous prime is 16251671113. The next prime is 16251671159. The reversal of 16251671121 is 12117615261.

It is not a de Polignac number, because 16251671121 - 2³ = 16251671113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16251671171) 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, 301870 + ... + 351608.

It is an arithmetic number, because the mean of its divisors is an integer number (1547908800).

Almost surely, 2^16251671121 is an apocalyptic number.

It is an amenable number.

16251671121 is a deficient number, since it is larger than the sum of its proper divisors (8514869679).

16251671121 is a wasteful number, since it uses less digits than its factorization.

16251671121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65308.

The product of its digits is 5040, while the sum is 33.

The spelling of 16251671121 in words is "sixteen billion, two hundred fifty-one million, six hundred seventy-one thousand, one hundred twenty-one".