16447209957 has 12 divisors (see below), whose sum is σ = 23759072064. Its totient is φ = 10963887720.

The previous prime is 16447209937. The next prime is 16447209971. The reversal of 16447209957 is 75990274461.

16447209957 is a `hidden beast` number, since 164 + 472 + 0 + 9 + 9 + 5 + 7 = 666.

It is not a de Polignac number, because 16447209957 - 2²⁶ = 16380101093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16447209907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47332 + ... + 187442.

It is an arithmetic number, because the mean of its divisors is an integer number (1979922672).

Almost surely, 2^16447209957 is an apocalyptic number.

It is an amenable number.

16447209957 is a deficient number, since it is larger than the sum of its proper divisors (7311862107).

16447209957 is a wasteful number, since it uses less digits than its factorization.

16447209957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153160 (or 153157 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 16447209957 in words is "sixteen billion, four hundred forty-seven million, two hundred nine thousand, nine hundred fifty-seven".