145520455550 has 24 divisors (see below), whose sum is σ = 270696289656. Its totient is φ = 58202108640.

The previous prime is 145520455543. The next prime is 145520455573. The reversal of 145520455550 is 55554025541.

It is a super-3 number, since 3×145520455550³ (a number of 34 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 145520455498 and 145520455507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 348464 + ... + 642236.

It is an arithmetic number, because the mean of its divisors is an integer number (11279012069).

Almost surely, 2^145520455550 is an apocalyptic number.

145520455550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145520455550 is a deficient number, since it is larger than the sum of its proper divisors (125175834106).

145520455550 is a wasteful number, since it uses less digits than its factorization.

145520455550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303692 (or 303687 counting only the distinct ones).

The product of its (nonzero) digits is 500000, while the sum is 41.

The spelling of 145520455550 in words is "one hundred forty-five billion, five hundred twenty million, four hundred fifty-five thousand, five hundred fifty".