154421440000000 has 416 divisors, whose sum is σ = 387119747252160. Its totient is φ = 61590528000000.

The previous prime is 154421439999997. The next prime is 154421440000031. The reversal of 154421440000000 is 44124451.

It is a super-2 number, since 2×154421440000000² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 154421440000000.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208959999631 + ... + 208960000369.

It is an arithmetic number, because the mean of its divisors is an integer number (930576315510).

Almost surely, 2^{154421440000000} is an apocalyptic number.

154421440000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154421440000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193559873626080).

154421440000000 is an abundant number, since it is smaller than the sum of its proper divisors (232698307252160).

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

154421440000000 is an frugal number, since it uses more digits than its factorization.

154421440000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451 (or 1399 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 154421440000000 its reverse (44124451), we get a palindrome (154421484124451).

The spelling of 154421440000000 in words is "one hundred fifty-four trillion, four hundred twenty-one billion, four hundred forty million", and thus it is an aban number.