161477442 has 48 divisors (see below), whose sum is σ = 417431520. Its totient is φ = 46135656.

The previous prime is 161477429. The next prime is 161477443. The reversal of 161477442 is 244774161.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 161477397 and 161477406.

It is not an unprimeable number, because it can be changed into a prime (161477443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27868 + ... + 33159.

It is an arithmetic number, because the mean of its divisors is an integer number (8696490).

Almost surely, 2^161477442 is an apocalyptic number.

161477442 is an abundant number, since it is smaller than the sum of its proper divisors (255954078).

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

161477442 is a wasteful number, since it uses less digits than its factorization.

161477442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61052 (or 61039 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 161477442 is about 12707.3774635052. The cubic root of 161477442 is about 544.5494039518.

The spelling of 161477442 in words is "one hundred sixty-one million, four hundred seventy-seven thousand, four hundred forty-two".