161011475 has 6 divisors (see below), whose sum is σ = 199654260. Its totient is φ = 128809160.

The previous prime is 161011463. The next prime is 161011481. The reversal of 161011475 is 574110161.

It is a happy number.

161011475 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-161011475 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3220205 + ... + 3220254.

It is an arithmetic number, because the mean of its divisors is an integer number (33275710).

Almost surely, 2^161011475 is an apocalyptic number.

161011475 is a deficient number, since it is larger than the sum of its proper divisors (38642785).

161011475 is an equidigital number, since it uses as much as digits as its factorization.

161011475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6440469 (or 6440464 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 161011475 is about 12689.0297107383. The cubic root of 161011475 is about 544.0251067475.

It can be divided in two parts, 16101 and 1475, that added together give a cube (17576 = 26³).

The spelling of 161011475 in words is "one hundred sixty-one million, eleven thousand, four hundred seventy-five".