164155880501 has 2 divisors, whose sum is σ = 164155880502. Its totient is φ = 164155880500.

The previous prime is 164155880479. The next prime is 164155880507. The reversal of 164155880501 is 105088551461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163722199876 + 433680625 = 404626^2 + 20825^2 .

It is a cyclic number.

It is not a de Polignac number, because 164155880501 - 2¹⁰ = 164155879477 is a prime.

It is a super-2 number, since 2×164155880501² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164155880507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82077940250 + 82077940251.

It is an arithmetic number, because the mean of its divisors is an integer number (82077940251).

Almost surely, 2^164155880501 is an apocalyptic number.

It is an amenable number.

164155880501 is a deficient number, since it is larger than the sum of its proper divisors (1).

164155880501 is an equidigital number, since it uses as much as digits as its factorization.

164155880501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192000, while the sum is 44.

The spelling of 164155880501 in words is "one hundred sixty-four billion, one hundred fifty-five million, eight hundred eighty thousand, five hundred one".