146444226221261 has 8 divisors (see below), whose sum is σ = 146596306395000. Its totient is φ = 146292182138880.

The previous prime is 146444226221177. The next prime is 146444226221263. The reversal of 146444226221261 is 162122622444641.

It can be written as a sum of positive squares in 4 ways, for example, as 130768301161 + 146313457920100 = 361619^2 + 12096010^2 .

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 146444226221261 - 2²² = 146444222026957 is a prime.

It is a super-2 number, since 2×146444226221261² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146444226221263) 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, 899636 + ... + 17137613.

It is an arithmetic number, because the mean of its divisors is an integer number (18324538299375).

Almost surely, 2^{146444226221261} is an apocalyptic number.

It is an amenable number.

146444226221261 is a deficient number, since it is larger than the sum of its proper divisors (152080173739).

146444226221261 is a wasteful number, since it uses less digits than its factorization.

146444226221261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18045679.

The product of its digits is 1769472, while the sum is 47.

The spelling of 146444226221261 in words is "one hundred forty-six trillion, four hundred forty-four billion, two hundred twenty-six million, two hundred twenty-one thousand, two hundred sixty-one".