164621051 has 8 divisors (see below), whose sum is σ = 196318464. Its totient is φ = 134968680.

The previous prime is 164620993. The next prime is 164621057. The reversal of 164621051 is 150126461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 164621051 - 2⁶ = 164620987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164621051.

It is not an unprimeable number, because it can be changed into a prime (164621057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511085 + ... + 511406.

It is an arithmetic number, because the mean of its divisors is an integer number (24539808).

Almost surely, 2^164621051 is an apocalyptic number.

164621051 is a deficient number, since it is larger than the sum of its proper divisors (31697413).

164621051 is a wasteful number, since it uses less digits than its factorization.

164621051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022521.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 164621051 is about 12830.4735298429. The cubic root of 164621051 is about 548.0604420785.

The spelling of 164621051 in words is "one hundred sixty-four million, six hundred twenty-one thousand, fifty-one".