73163778 has 8 divisors (see below), whose sum is σ = 146327568. Its totient is φ = 24387924.

The previous prime is 73163777. The next prime is 73163807. The reversal of 73163778 is 87736137.

It is a sphenic number, since it is the product of 3 distinct primes.

73163778 is an admirable number.

It is a super-2 number, since 2×73163778² = 10705876822466568, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73163777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6096976 + ... + 6096987.

It is an arithmetic number, because the mean of its divisors is an integer number (18290946).

Almost surely, 2^73163778 is an apocalyptic number.

73163778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

73163778 is a wasteful number, since it uses less digits than its factorization.

73163778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12193968.

The product of its digits is 148176, while the sum is 42.

The square root of 73163778 is about 8553.5827581195. The cubic root of 73163778 is about 418.2462358776.

The spelling of 73163778 in words is "seventy-three million, one hundred sixty-three thousand, seven hundred seventy-eight".