16161630681 has 16 divisors (see below), whose sum is σ = 24629341568. Its totient is φ = 9234432000.

The previous prime is 16161630677. The next prime is 16161630691. The reversal of 16161630681 is 18603616161.

It is not a de Polignac number, because 16161630681 - 2² = 16161630677 is a prime.

It is a super-3 number, since 3×16161630681³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16161630691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297531 + ... + 347631.

It is an arithmetic number, because the mean of its divisors is an integer number (1539333848).

Almost surely, 2^16161630681 is an apocalyptic number.

It is an amenable number.

16161630681 is a deficient number, since it is larger than the sum of its proper divisors (8467710887).

16161630681 is a wasteful number, since it uses less digits than its factorization.

16161630681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65472.

The product of its (nonzero) digits is 31104, while the sum is 39.

The spelling of 16161630681 in words is "sixteen billion, one hundred sixty-one million, six hundred thirty thousand, six hundred eighty-one".