161497470 has 32 divisors (see below), whose sum is σ = 393383808. Its totient is φ = 42422688.

The previous prime is 161497463. The next prime is 161497481. The reversal of 161497470 is 74794161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38164 + ... + 42183.

It is an arithmetic number, because the mean of its divisors is an integer number (12293244).

Almost surely, 2^161497470 is an apocalyptic number.

161497470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161497470 is an abundant number, since it is smaller than the sum of its proper divisors (231886338).

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

161497470 is a wasteful number, since it uses less digits than its factorization.

161497470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80424.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 161497470 is about 12708.1654852304. The cubic root of 161497470 is about 544.5719164556.

The spelling of 161497470 in words is "one hundred sixty-one million, four hundred ninety-seven thousand, four hundred seventy".