164542078 has 4 divisors (see below), whose sum is σ = 246813120. Its totient is φ = 82271038.

The previous prime is 164542039. The next prime is 164542097. The reversal of 164542078 is 870245461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 870245461 = 431 ⋅2019131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41135518 + ... + 41135521.

It is an arithmetic number, because the mean of its divisors is an integer number (61703280).

Almost surely, 2^164542078 is an apocalyptic number.

164542078 is a deficient number, since it is larger than the sum of its proper divisors (82271042).

164542078 is an equidigital number, since it uses as much as digits as its factorization.

164542078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82271041.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 164542078 is about 12827.3956047204. The cubic root of 164542078 is about 547.9727884440.

The spelling of 164542078 in words is "one hundred sixty-four million, five hundred forty-two thousand, seventy-eight".