161416651 has 16 divisors (see below), whose sum is σ = 179660160. Its totient is φ = 143795520.

The previous prime is 161416621. The next prime is 161416667. The reversal of 161416651 is 156614161.

It is not a de Polignac number, because 161416651 - 2¹⁵ = 161383883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161416621) 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, 143176 + ... + 144298.

It is an arithmetic number, because the mean of its divisors is an integer number (11228760).

Almost surely, 2^161416651 is an apocalyptic number.

161416651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

161416651 is a deficient number, since it is larger than the sum of its proper divisors (18243509).

161416651 is a wasteful number, since it uses less digits than its factorization.

161416651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386.

The product of its digits is 4320, while the sum is 31.

The square root of 161416651 is about 12704.9852813768. The cubic root of 161416651 is about 544.4810603338.

The spelling of 161416651 in words is "one hundred sixty-one million, four hundred sixteen thousand, six hundred fifty-one".