164154572531 has 4 divisors (see below), whose sum is σ = 164808575064. Its totient is φ = 163500570000.

The previous prime is 164154572509. The next prime is 164154572537. The reversal of 164154572531 is 135275451461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135275451461 = 6091 ⋅22209071.

It is a cyclic number.

It is not a de Polignac number, because 164154572531 - 2¹⁸ = 164154310387 is a prime.

It is a super-2 number, since 2×164154572531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164154572537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327000890 + ... + 327001391.

It is an arithmetic number, because the mean of its divisors is an integer number (41202143766).

Almost surely, 2^164154572531 is an apocalyptic number.

164154572531 is a deficient number, since it is larger than the sum of its proper divisors (654002533).

164154572531 is an equidigital number, since it uses as much as digits as its factorization.

164154572531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654002532.

The product of its digits is 504000, while the sum is 44.

The spelling of 164154572531 in words is "one hundred sixty-four billion, one hundred fifty-four million, five hundred seventy-two thousand, five hundred thirty-one".