164719990503566 has 4 divisors (see below), whose sum is σ = 247079985755352. Its totient is φ = 82359995251782.

The previous prime is 164719990503527. The next prime is 164719990503569. The reversal of 164719990503566 is 665305099917461.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 164719990503566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164719990503569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41179997625890 + ... + 41179997625893.

It is an arithmetic number, because the mean of its divisors is an integer number (61769996438838).

Almost surely, 2^{164719990503566} is an apocalyptic number.

164719990503566 is a deficient number, since it is larger than the sum of its proper divisors (82359995251786).

164719990503566 is an equidigital number, since it uses as much as digits as its factorization.

164719990503566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82359995251785.

The product of its (nonzero) digits is 330674400, while the sum is 71.

The spelling of 164719990503566 in words is "one hundred sixty-four trillion, seven hundred nineteen billion, nine hundred ninety million, five hundred three thousand, five hundred sixty-six".