154644166223220 has 48 divisors (see below), whose sum is σ = 433741320831168. Its totient is φ = 41168191430400.

The previous prime is 154644166223191. The next prime is 154644166223221. The reversal of 154644166223220 is 22322661446451.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 154644166223220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154644166223221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2195367481 + ... + 2195437920.

It is an arithmetic number, because the mean of its divisors is an integer number (9036277517316).

Almost surely, 2^{154644166223220} is an apocalyptic number.

154644166223220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154644166223220 is an abundant number, since it is smaller than the sum of its proper divisors (279097154607948).

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

154644166223220 is a wasteful number, since it uses less digits than its factorization.

154644166223220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4390806000 (or 4390805998 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 154644166223220 in words is "one hundred fifty-four trillion, six hundred forty-four billion, one hundred sixty-six million, two hundred twenty-three thousand, two hundred twenty".