164251041241645 has 4 divisors (see below), whose sum is σ = 197101249489980. Its totient is φ = 131400832993312.

The previous prime is 164251041241621. The next prime is 164251041241687. The reversal of 164251041241645 is 546142140152461.

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

It can be written as a sum of positive squares in 2 ways, for example, as 128494444420521 + 35756596821124 = 11335539^2 + 5979682^2 .

It is a cyclic number.

It is not a de Polignac number, because 164251041241645 - 2³¹ = 164248893757997 is a prime.

It is a super-3 number, since 3×164251041241645³ (a number of 44 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164251041241595 and 164251041241604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16425104124160 + ... + 16425104124169.

It is an arithmetic number, because the mean of its divisors is an integer number (49275312372495).

Almost surely, 2^{164251041241645} is an apocalyptic number.

It is an amenable number.

164251041241645 is a deficient number, since it is larger than the sum of its proper divisors (32850208248335).

164251041241645 is an equidigital number, since it uses as much as digits as its factorization.

164251041241645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32850208248334.

The product of its (nonzero) digits is 921600, while the sum is 46.

The spelling of 164251041241645 in words is "one hundred sixty-four trillion, two hundred fifty-one billion, forty-one million, two hundred forty-one thousand, six hundred forty-five".