161266647400 has 96 divisors (see below), whose sum is σ = 376569648000. Its totient is φ = 64227806720.

The previous prime is 161266647359. The next prime is 161266647419. The reversal of 161266647400 is 4746662161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51703041 + ... + 51706159.

It is an arithmetic number, because the mean of its divisors is an integer number (3922600500).

Almost surely, 2^161266647400 is an apocalyptic number.

161266647400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161266647400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188284824000).

161266647400 is an abundant number, since it is smaller than the sum of its proper divisors (215303000600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161266647400 is a wasteful number, since it uses less digits than its factorization.

161266647400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4171 (or 4162 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 161266647400 in words is "one hundred sixty-one billion, two hundred sixty-six million, six hundred forty-seven thousand, four hundred".