164699219801 has 4 divisors (see below), whose sum is σ = 164918527104. Its totient is φ = 164479912500.

The previous prime is 164699219777. The next prime is 164699219819. The reversal of 164699219801 is 108912996461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 164699219801 - 2²² = 164695025497 is a prime.

It is a super-2 number, since 2×164699219801² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164699210801) 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, 109652525 + ... + 109654026.

It is an arithmetic number, because the mean of its divisors is an integer number (41229631776).

Almost surely, 2^164699219801 is an apocalyptic number.

It is an amenable number.

164699219801 is a deficient number, since it is larger than the sum of its proper divisors (219307303).

164699219801 is an equidigital number, since it uses as much as digits as its factorization.

164699219801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219307302.

The product of its (nonzero) digits is 1679616, while the sum is 56.

The spelling of 164699219801 in words is "one hundred sixty-four billion, six hundred ninety-nine million, two hundred nineteen thousand, eight hundred one".