146879109581 has 4 divisors (see below), whose sum is σ = 148891152252. Its totient is φ = 144867066912.

The previous prime is 146879109571. The next prime is 146879109599. The reversal of 146879109581 is 185901978641.

146879109581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74482597225 + 72396512356 = 272915^2 + 269066^2 .

It is a cyclic number.

It is not a de Polignac number, because 146879109581 - 2¹⁰ = 146879108557 is a prime.

It is a super-2 number, since 2×146879109581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 146879109581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146879109551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1006021226 + ... + 1006021371.

It is an arithmetic number, because the mean of its divisors is an integer number (37222788063).

Almost surely, 2^146879109581 is an apocalyptic number.

It is an amenable number.

146879109581 is a deficient number, since it is larger than the sum of its proper divisors (2012042671).

146879109581 is an equidigital number, since it uses as much as digits as its factorization.

146879109581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012042670.

The product of its (nonzero) digits is 4354560, while the sum is 59.

The spelling of 146879109581 in words is "one hundred forty-six billion, eight hundred seventy-nine million, one hundred nine thousand, five hundred eighty-one".