161436474 has 12 divisors (see below), whose sum is σ = 349779066. Its totient is φ = 53812152.

The previous prime is 161436469. The next prime is 161436479. The reversal of 161436474 is 474634161.

161436474 is a `hidden beast` number, since 1 + 6 + 1 + 4 + 3 + 647 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (161436469) and next prime (161436479).

It can be written as a sum of positive squares in only one way, i.e., 149010849 + 12425625 = 12207^2 + 3525^2 .

It is not an unprimeable number, because it can be changed into a prime (161436479) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4484329 + ... + 4484364.

Almost surely, 2^161436474 is an apocalyptic number.

161436474 is an abundant number, since it is smaller than the sum of its proper divisors (188342592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161436474 is a wasteful number, since it uses less digits than its factorization.

161436474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8968701 (or 8968698 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 161436474 is about 12705.7653842655. The cubic root of 161436474 is about 544.5033480102.

The spelling of 161436474 in words is "one hundred sixty-one million, four hundred thirty-six thousand, four hundred seventy-four".