164253778 has 16 divisors (see below), whose sum is σ = 265688640. Its totient is φ = 75707856.

The previous prime is 164253769. The next prime is 164253781. The reversal of 164253778 is 877352461.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17683 + ... + 25321.

It is an arithmetic number, because the mean of its divisors is an integer number (16605540).

Almost surely, 2^164253778 is an apocalyptic number.

164253778 is a deficient number, since it is larger than the sum of its proper divisors (101434862).

164253778 is a wasteful number, since it uses less digits than its factorization.

164253778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8481.

The product of its digits is 282240, while the sum is 43.

The square root of 164253778 is about 12816.1530109468. The cubic root of 164253778 is about 547.6525605029.

The spelling of 164253778 in words is "one hundred sixty-four million, two hundred fifty-three thousand, seven hundred seventy-eight".