16161101638 has 16 divisors (see below), whose sum is σ = 26944411536. Its totient is φ = 7207351840.

The previous prime is 16161101611. The next prime is 16161101657. The reversal of 16161101638 is 83610116161.

It is a super-2 number, since 2×16161101638² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6928981 + ... + 6931312.

It is an arithmetic number, because the mean of its divisors is an integer number (1684025721).

Almost surely, 2^16161101638 is an apocalyptic number.

16161101638 is a deficient number, since it is larger than the sum of its proper divisors (10783309898).

16161101638 is a wasteful number, since it uses less digits than its factorization.

16161101638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13860359.

The product of its (nonzero) digits is 5184, while the sum is 34.

Adding to 16161101638 its reverse (83610116161), we get a palindrome (99771217799).

The spelling of 16161101638 in words is "sixteen billion, one hundred sixty-one million, one hundred one thousand, six hundred thirty-eight".