164238037528385 has 8 divisors (see below), whose sum is σ = 197085725764200. Its totient is φ = 131390376202624.

The previous prime is 164238037528381. The next prime is 164238037528393. The reversal of 164238037528385 is 583825730832461.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 55286110024369 + 108951927504016 = 7435463^2 + 10438004^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 164238037528385 - 2² = 164238037528381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164238037528381) 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, 10897091 + ... + 21147639.

It is an arithmetic number, because the mean of its divisors is an integer number (24635715720525).

Almost surely, 2^{164238037528385} is an apocalyptic number.

It is an amenable number.

164238037528385 is a deficient number, since it is larger than the sum of its proper divisors (32847688235815).

164238037528385 is a wasteful number, since it uses less digits than its factorization.

164238037528385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13455027.

The product of its (nonzero) digits is 232243200, while the sum is 65.

The spelling of 164238037528385 in words is "one hundred sixty-four trillion, two hundred thirty-eight billion, thirty-seven million, five hundred twenty-eight thousand, three hundred eighty-five".