16161857447 has 8 divisors (see below), whose sum is σ = 16184401152. Its totient is φ = 16139331000.

The previous prime is 16161857423. The next prime is 16161857461. The reversal of 16161857447 is 74475816161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16161857447 - 2²² = 16157663143 is a prime.

It is a super-2 number, since 2×16161857447² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16161857395 and 16161857404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16161857417) 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, 3987572 + ... + 3991622.

It is an arithmetic number, because the mean of its divisors is an integer number (2023050144).

Almost surely, 2^16161857447 is an apocalyptic number.

16161857447 is a deficient number, since it is larger than the sum of its proper divisors (22543705).

16161857447 is a wasteful number, since it uses less digits than its factorization.

16161857447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8629.

The product of its digits is 1128960, while the sum is 50.

The spelling of 16161857447 in words is "sixteen billion, one hundred sixty-one million, eight hundred fifty-seven thousand, four hundred forty-seven".