164116557541 has 4 divisors (see below), whose sum is σ = 166193982400. Its totient is φ = 162039132684.

The previous prime is 164116557491. The next prime is 164116557551. The reversal of 164116557541 is 145755611461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 145755611461 = 179 ⋅814277159.

It is a cyclic number.

It is not a de Polignac number, because 164116557541 - 2⁷ = 164116557413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164116557491 and 164116557500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164116557551) 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, 1038712311 + ... + 1038712468.

It is an arithmetic number, because the mean of its divisors is an integer number (41548495600).

Almost surely, 2^164116557541 is an apocalyptic number.

It is an amenable number.

164116557541 is a deficient number, since it is larger than the sum of its proper divisors (2077424859).

164116557541 is an equidigital number, since it uses as much as digits as its factorization.

164116557541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077424858.

The product of its digits is 504000, while the sum is 46.

The spelling of 164116557541 in words is "one hundred sixty-four billion, one hundred sixteen million, five hundred fifty-seven thousand, five hundred forty-one".