154545321520 has 20 divisors (see below), whose sum is σ = 359317872720. Its totient is φ = 61818128576.

The previous prime is 154545321503. The next prime is 154545321577. The reversal of 154545321520 is 25123545451.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×154545321520² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 154545321520.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 965908180 + ... + 965908339.

It is an arithmetic number, because the mean of its divisors is an integer number (17965893636).

Almost surely, 2^154545321520 is an apocalyptic number.

154545321520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154545321520 is an abundant number, since it is smaller than the sum of its proper divisors (204772551200).

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

154545321520 is a wasteful number, since it uses less digits than its factorization.

154545321520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931816532 (or 1931816526 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 37.

Adding to 154545321520 its reverse (25123545451), we get a palindrome (179668866971).

The spelling of 154545321520 in words is "one hundred fifty-four billion, five hundred forty-five million, three hundred twenty-one thousand, five hundred twenty".