161333401266 has 48 divisors (see below), whose sum is σ = 362563821984. Its totient is φ = 53768660544.

The previous prime is 161333401253. The next prime is 161333401283. The reversal of 161333401266 is 662104333161.

161333401266 is a `hidden beast` number, since 1 + 61 + 3 + 334 + 0 + 1 + 266 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 161333401266.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3218205 + ... + 3267951.

It is an arithmetic number, because the mean of its divisors is an integer number (7553412958).

Almost surely, 2^161333401266 is an apocalyptic number.

161333401266 is an abundant number, since it is smaller than the sum of its proper divisors (201230420718).

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

161333401266 is an equidigital number, since it uses as much as digits as its factorization.

161333401266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56437 (or 56425 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The spelling of 161333401266 in words is "one hundred sixty-one billion, three hundred thirty-three million, four hundred one thousand, two hundred sixty-six".