164350778 has 24 divisors (see below), whose sum is σ = 266077056. Its totient is φ = 76051800.

The previous prime is 164350763. The next prime is 164350787. The reversal of 164350778 is 877053461.

It is a super-2 number, since 2×164350778² = 54022356458410568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30293 + ... + 35303.

It is an arithmetic number, because the mean of its divisors is an integer number (11086544).

Almost surely, 2^164350778 is an apocalyptic number.

164350778 is a deficient number, since it is larger than the sum of its proper divisors (101726278).

164350778 is a wasteful number, since it uses less digits than its factorization.

164350778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5090 (or 5067 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 164350778 is about 12819.9367393135. The cubic root of 164350778 is about 547.7603446187.

The spelling of 164350778 in words is "one hundred sixty-four million, three hundred fifty thousand, seven hundred seventy-eight".