16161261213406 has 32 divisors (see below), whose sum is σ = 26300272174848. Its totient is φ = 7418015016960.

The previous prime is 16161261213359. The next prime is 16161261213407. The reversal of 16161261213406 is 60431216216161.

It is a super-2 number, since 2×16161261213406² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16161261213407) 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, 4393491 + ... + 7185073.

It is an arithmetic number, because the mean of its divisors is an integer number (821883505464).

Almost surely, 2^{16161261213406} is an apocalyptic number.

16161261213406 is a deficient number, since it is larger than the sum of its proper divisors (10139010961442).

16161261213406 is a wasteful number, since it uses less digits than its factorization.

16161261213406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795796.

The product of its (nonzero) digits is 62208, while the sum is 40.

Adding to 16161261213406 its reverse (60431216216161), we get a palindrome (76592477429567).

The spelling of 16161261213406 in words is "sixteen trillion, one hundred sixty-one billion, two hundred sixty-one million, two hundred thirteen thousand, four hundred six".