164546243449 has 27 divisors (see below), whose sum is σ = 193120511493. Its totient is φ = 139791068088.

The previous prime is 164546243423. The next prime is 164546243497. The reversal of 164546243449 is 944342645461.

The square root of 164546243449 is 405643.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 164546243449 - 2¹³ = 164546235257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164546243396 and 164546243405.

It is not an unprimeable number, because it can be changed into a prime (164546243249) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 474196494 + ... + 474196840.

Almost surely, 2^164546243449 is an apocalyptic number.

164546243449 is the 405643-rd square number.

164546243449 is the 202822-nd centered octagonal number.

It is an amenable number.

164546243449 is a deficient number, since it is larger than the sum of its proper divisors (28574268044).

164546243449 is an frugal number, since it uses more digits than its factorization.

164546243449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042 (or 521 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 52.

The spelling of 164546243449 in words is "one hundred sixty-four billion, five hundred forty-six million, two hundred forty-three thousand, four hundred forty-nine".