165221145126444 has 48 divisors (see below), whose sum is σ = 424726904157696. Its totient is φ = 49571300664000.

The previous prime is 165221145126437. The next prime is 165221145126451. The reversal of 165221145126444 is 444621541122561.

It is an interprime number because it is at equal distance from previous prime (165221145126437) and next prime (165221145126451).

It is a junction number, because it is equal to n+sod(n) for n = 165221145126393 and 165221145126402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6196399252 + ... + 6196425915.

It is an arithmetic number, because the mean of its divisors is an integer number (8848477169952).

Almost surely, 2^{165221145126444} is an apocalyptic number.

It is an amenable number.

165221145126444 is an abundant number, since it is smaller than the sum of its proper divisors (259505759031252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165221145126444 is a wasteful number, since it uses less digits than its factorization.

165221145126444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12392825286 (or 12392825284 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 48.

The spelling of 165221145126444 in words is "one hundred sixty-five trillion, two hundred twenty-one billion, one hundred forty-five million, one hundred twenty-six thousand, four hundred forty-four".