161671477 has 8 divisors (see below), whose sum is σ = 177128640. Its totient is φ = 146340960.

The previous prime is 161671459. The next prime is 161671507. The reversal of 161671477 is 774176161.

161671477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161671477 - 2²³ = 153282869 is a prime.

It is a super-2 number, since 2×161671477² = 52275332950723058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161671457) 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, 28977 + ... + 34102.

It is an arithmetic number, because the mean of its divisors is an integer number (22141080).

Almost surely, 2^161671477 is an apocalyptic number.

It is an amenable number.

161671477 is a deficient number, since it is larger than the sum of its proper divisors (15457163).

161671477 is a wasteful number, since it uses less digits than its factorization.

161671477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63323.

The product of its digits is 49392, while the sum is 40.

The square root of 161671477 is about 12715.0099095518. The cubic root of 161671477 is about 544.7674309998.

The spelling of 161671477 in words is "one hundred sixty-one million, six hundred seventy-one thousand, four hundred seventy-seven".