16161630 has 16 divisors (see below), whose sum is σ = 38787984. Its totient is φ = 4309760.

The previous prime is 16161623. The next prime is 16161631. The reversal of 16161630 is 3616161.

It is a super-2 number, since 2×16161630² = 522396568513800, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16161630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16161631) 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, 269331 + ... + 269390.

It is an arithmetic number, because the mean of its divisors is an integer number (2424249).

Almost surely, 2^16161630 is an apocalyptic number.

16161630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16161630 is an abundant number, since it is smaller than the sum of its proper divisors (22626354).

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

16161630 is a wasteful number, since it uses less digits than its factorization.

16161630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538731.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 16161630 is about 4020.1529821637. The cubic root of 16161630 is about 252.8298730754.

Adding to 16161630 its reverse (3616161), we get a palindrome (19777791).

The spelling of 16161630 in words is "sixteen million, one hundred sixty-one thousand, six hundred thirty".