163940294067 has 32 divisors (see below), whose sum is σ = 241695498240. Its totient is φ = 98016834720.

The previous prime is 163940294057. The next prime is 163940294071. The reversal of 163940294067 is 760492049361.

It is a happy number.

It is not a de Polignac number, because 163940294067 - 2⁶ = 163940294003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163940294017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 746778 + ... + 941040.

It is an arithmetic number, because the mean of its divisors is an integer number (7552984320).

Almost surely, 2^163940294067 is an apocalyptic number.

163940294067 is a deficient number, since it is larger than the sum of its proper divisors (77755204173).

163940294067 is a wasteful number, since it uses less digits than its factorization.

163940294067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194623.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 163940294067 in words is "one hundred sixty-three billion, nine hundred forty million, two hundred ninety-four thousand, sixty-seven".