161616149351 has 4 divisors (see below), whose sum is σ = 161642899752. Its totient is φ = 161589398952.

The previous prime is 161616149347. The next prime is 161616149381. The reversal of 161616149351 is 153941616161.

161616149351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161616149351 - 2² = 161616149347 is a prime.

It is a super-2 number, since 2×161616149351² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161616149381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13366136 + ... + 13378221.

It is an arithmetic number, because the mean of its divisors is an integer number (40410724938).

Almost surely, 2^161616149351 is an apocalyptic number.

161616149351 is a deficient number, since it is larger than the sum of its proper divisors (26750401).

161616149351 is an equidigital number, since it uses as much as digits as its factorization.

161616149351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26750400.

The product of its digits is 116640, while the sum is 44.

The spelling of 161616149351 in words is "one hundred sixty-one billion, six hundred sixteen million, one hundred forty-nine thousand, three hundred fifty-one".